Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1991 Oldsmobile Toronado V6-3800 3.8LFACTORY OEM SERVICE PROCEDURE
Splices
Splice S101: Engine Harness, RH Rear Of Engine, RH Rear Of Valve Cover
Splice S102: Forward Lamp harness, LH Front Of Engine Compartment
Splice S103: Forward Lamp Harness, LH Front Of Engine Compartment
Splice S104: Engine Harness, Lower RH Front Of Engine
Splice S105: Forward Lamp Harness, LH Front Of Engine Compartment, Near Underhood Relay Center
Splice S107: Engine Harness, RH Rear Of Engine
Splice S109: Engine Harness, Lower RH Front Of Engine, Near A/C Compressor Clutch Breakout
Splice S110: Forward Lamp harness, Right Of LH Headlamp Breakout
Splice S111: Engine Harness, RH Rear Of Engine
Splice S112: Heated Windshield, RH Rear Corner Of Engine Compartment
Splice S113: Heated Windshield Harness, RH Rear Corner Of Engine Compartment
Splice S117: Forward Lamp Harness, Left Of LH Headlamp Breakout
Splice S118: Forward Lamp Harness, Left Of LH Headlamp Breakout
Splice S119: Forward Lamp Harness, Behind RH Headlamp
Splice S120: Instrument Panel Harness, Behind LH Side Of Instrument Panel
Splice S125: Forward Lamp Harness, Left Of LH Headlamp Breakout
Splice S129: Ignition Module Jumper Harness, Top RH Side Of Engine
Splice S130: Ignition Module Jumper Harness, Top RH Side Of Engine
Splice S137: Engine Harness, Top RH Side Of Engine
Splice S148: Forward Lamp Harness, LH Front Of Engine Compartment, Near Relay Center
Splice S160: Forward Lamp Harness, Front Of Vehicle, near Pusher Coolant Fan Breakout
Splice S200: Dash harness, Behind LH Side Of Instrument Panel, RH Side Of Steering
Splice S202: Dash Harness, Behind LH Side Of Instrument Panel, RH Side Of Steering Column
Splice S204 (With Vehicle Information Center): Radio Jumper Harness, In Console, By Radio
Splice S206: Dash Harness, Behind RH Side Of Instrument Panel
Splice S207: Dash Harness, Behind RH Side Of Instrument Panel, In C200 Breakout
Splice S209: Dash Harness, Behind RH Side Of Instrument Panel
Splice S211: Dash Harness, Above Steering Column
Splice S212: Dash Harness, Above Steering Column
Splice S213: Dash Harness, Above Steering Column
Splice S214: Dash Harness, Behind RH Side Of Instrument Panel
Splice S215: Dash Harness, Behind RH Side Of Instrument Panel
Splice S216: Instrument Panel Harness, Behind LH Side Of Instrument Panel, Instrument Panel Cluster Breakout
Splice S217: Dash Harness, Behind LH Side Of Instrument Panel, RH Side Of Steering Column
Splice S220: Radio Jumper Harness, Above Steering Column
Splice S221: Dash Harness, Behind RH Side Of Instrument Panel
Splice S222: Dash Harness, Behind LH Side Of Instrument Panel
Splice S223: Dash Harness, Behind LH Side Of Instrument Panel, RH Side Of Steering Column
Splice S227: Dash Harness, Behind RH Side Of Instrument Panel
Splice S228 (Less Vehicle Information Center): Radio Jumper Harness, Behind Center Of Instrument Panel
Splice S228 (With Vehicle Information Center): Radio Jumper Harness, In Console, By Radio
Splice S232: Dash Harness, Behind RH Side Of Instrument Panel
Splice S233: Dash Harness, Above Steering Column
Splice S234: Dash Harness, Behind RH Side Of Instrument Panel
Splice S236: Body Main Harness, Below RH Front Seat
Splice S238: Dash Harness, Behind LH Side Of Instrument Panel, RH Side Of Steering Column
Splice S240: Instrument Panel Harness, Behind LH Side Of Instrument Panel, RH Side OF Steering Column
Splice S241: Dash Harness, Behind LH Side Of Instrument Panel, Above Steering Column
Splice S243: Dash Harness, Behind LH Side Of Instrument Panel, At Starter Enable Relay
Splice S246: Dash Harness, Behind RH Side Of Instrument Panel
Splice S252: Dash Harness, Behind Center OF Instrument Panel
Splice S254: Instrument Panel Harness, Behind LH Side Of Instrument Panel, RH Side Of Steering Column
Splice S255: Instrument Panel Harness, Behind LH Side Of Instrument Panel, RH Side Of Steering Column
Splice S256: Instrument Panel Harness, Behind Center Of Instrument Panel
Splice S260: Dash Harness, Behind LH Side Of Instrument Panel, In P100 Grommet Breakout
Splice S261: Dash Harness, Above Steering Column
Splice S265: Dash Harness, Behind RH Side Of Instrument Panel
Splice S268: Dash Harness, Behind LH Side Of Instrument Panel, RH Side Of Steering Column
Splice S270: Radio Jumper Harness, Behind Center Of Instrument Panel
Splice S271: Radio Jumper Harness, Behind Center Of Instrument Panel
Splice S273 (Less Vehicle Information Center): Radio Jumper Harness, Behind Center Of Instrument Panel
Splice S273 (With Vehicle Information Center): Radio Jumper Harness, In Console By Radio
Splice S275 (Less Vehicle Information Center): Radio Jumper Harness, Behind Center Of Instrument Panel
Splice S275 (With Vehicle Information Center):Radio Jumper Harness, In Console, Near Radio
Splice S278: Radio Jumper Harness, Behind Center Of Instrument Panel
Splice S279: Radio Jumper Harness, Behind Center Of Instrument Panel
Splice S280: Dash Harness, Behind Harness, Behind LH Side Of Instrument Panel, RH Side OF Steering Column
Splice S281: Dash Harness, Behind LH Side Of Instrument panel, RH Side OF Steering Column
Splice S282: Instrument Panel Harness, Behind LH Side Of Instrument Panel, In Cluster Connector Breakout
Splice S283: Dash Harness, Above Steering Column
Splice S284: Dash Harness, Behind LH Side Of Instrument Panel, RH Side Of Steering Column
Splice S287: Anti-Lock Brake Harness, LH Side Of Luggage Compartment
Splice S290: Ashtray Jumper Harness
Splice S291: Anti-Lock Brake Main Harness, Behind LH Side Of Instrument Panel, Left Of Steering Column Support
Splice S294: Dash Harness, Behind RH Side Of Instrument Panel
Splice S296: Body Main Garness, RH Front Of Luggage Compartment
Splice S297: Dash Harness, Behind RH Side Of Instrument Panel, In Dual Sensor Breakout
Splice S303: Body Main Harness, Below RH Front Seat
Splice S304: Body main Harness, Below RH Front Seat
Splice S305: Body main harness, RH Front Of Luggage Compartment
Splice S306: Body Main Harness, Center Front Of Luggage Compartment
Splice S308: Body Main Harness, Below RH Rear Seat
Splice S309: Lear-Siegler Seat Harness, Below LH Front Seat
Splice S311: Body Main Harness, Below LH Side Of LH Front Seat
Splice S312: Body main Harness, Below LH Front Seat
Splice S313: Body Main Harness, Below LH Front Seat
Splice S314: Body Main Harness, Below LH Side Of LH Front Seat
Splice S315: Body Main Harness, Below LH Front Seat
Splice S316: Body Main Harness, Front Of LH Front Door Sill
Splice S317: Body Main Harness, Front Of LH Front Door Sill
Splice S318: Console Harness, Behind Gear Selector
Splice S320: Body Main Harness, Below LH Front Seat
Splice S321: Body Main Harness. Below LH Front Seat
Splice S323: Body Main Harness, Below RH Front Seat
Splice S324: Cellular Phone Harness, By Handset Connector Breakout
Splice S343: Body Main Harness, Below RH Front Seat
Splice S344: Body main Harness, Below RH Front Seat
Splice S360: Lear-Siegler Seat Harness, Below Center Console
Splice S361: Lear-Siegler Seat Harness, Below RH Front Seat
Splice S362: Lear-Siegler Seat Harness, Below RH Front Seat
Splice S363: Lear-Siegler Seat Harness, Below Center Console
Splice S364: Lear-Siegler Seat Harness, Below LH Front Seat
Splice S365: Lear-Siegler Seat Harness, Below Console, Near Console Seat Switch
Splice S366: Lear-Siegler Seat Harness, Below LH Front Seat
Splice S400: Rear Bumper Harness, LH Side Of Rear Bumper
Splice S401: Rear Bumper Harness, Center Of Rear Bumper
Splice S402: Rear Body Harness, RH Rear Corner Of Luggage Compartment
Splice S403: Rear Body Harness, RH Rear Of Luggage Compartment
Splice S404: Body Rear Harness, Near RH Tail Lights
Splice S405: Body Rear Harness, Near LH Tail Lights
Splice S408: Body Main Harness, Below RH Side Of Rear Seat
Splice S409: Body main Harness, RH Front Of Luggage Compartment
Splice S415: Body main Harness, RH Front Of Luggage Compartment
Splice S417: Body main Harness, RH Side Of Rear Bumper
Splice S419: Body main Harness, RH Side Of Luggage Compartment
Splice S450: Cellular Phone Harness Center Front Of Luggage Compartment
Splice S500: Body Main Harness, Center Front Of LH Door
Splice S501: Body Main Harness, Center Front Of LH Door
Splice S502: Body Main Harness, Center Front Of LH Door
Splice S505: Body Main Harness, Center Of LH Door
Splice S506: Body Main Harness, In Center Front Of RH Door
Splice S526: Body Main Harness, In LH Door, In Power Window Switch Breakout
Splice S601: Body Main Harness, Center Front Of RH Door
Splice S602: Body Main Harness, Center Front Of RH Door
Splice S605: Body Main Harness, Center Of RH Door
Splice S606: Body Main Harness, In Center Front Of RH Door
Splice S901: Header Harness, RH Side Of Windshield Header
Splice S902: Header Harness, RH Side Of Windshield Header
Splice S102: Forward Lamp harness, LH Front Of Engine Compartment
Splice S103: Forward Lamp Harness, LH Front Of Engine Compartment
Splice S104: Engine Harness, Lower RH Front Of Engine
Splice S105: Forward Lamp Harness, LH Front Of Engine Compartment, Near Underhood Relay Center
Splice S107: Engine Harness, RH Rear Of Engine
Splice S109: Engine Harness, Lower RH Front Of Engine, Near A/C Compressor Clutch Breakout
Splice S110: Forward Lamp harness, Right Of LH Headlamp Breakout
Splice S111: Engine Harness, RH Rear Of Engine
Splice S112: Heated Windshield, RH Rear Corner Of Engine Compartment
Splice S113: Heated Windshield Harness, RH Rear Corner Of Engine Compartment
Splice S117: Forward Lamp Harness, Left Of LH Headlamp Breakout
Splice S118: Forward Lamp Harness, Left Of LH Headlamp Breakout
Splice S119: Forward Lamp Harness, Behind RH Headlamp
Splice S120: Instrument Panel Harness, Behind LH Side Of Instrument Panel
Splice S125: Forward Lamp Harness, Left Of LH Headlamp Breakout
Splice S129: Ignition Module Jumper Harness, Top RH Side Of Engine
Splice S130: Ignition Module Jumper Harness, Top RH Side Of Engine
Splice S137: Engine Harness, Top RH Side Of Engine
Splice S148: Forward Lamp Harness, LH Front Of Engine Compartment, Near Relay Center
Splice S160: Forward Lamp Harness, Front Of Vehicle, near Pusher Coolant Fan Breakout
Splice S200: Dash harness, Behind LH Side Of Instrument Panel, RH Side Of Steering
Splice S202: Dash Harness, Behind LH Side Of Instrument Panel, RH Side Of Steering Column
Splice S204 (With Vehicle Information Center): Radio Jumper Harness, In Console, By Radio
Splice S206: Dash Harness, Behind RH Side Of Instrument Panel
Splice S207: Dash Harness, Behind RH Side Of Instrument Panel, In C200 Breakout
Splice S209: Dash Harness, Behind RH Side Of Instrument Panel
Splice S211: Dash Harness, Above Steering Column
Splice S212: Dash Harness, Above Steering Column
Splice S213: Dash Harness, Above Steering Column
Splice S214: Dash Harness, Behind RH Side Of Instrument Panel
Splice S215: Dash Harness, Behind RH Side Of Instrument Panel
Splice S216: Instrument Panel Harness, Behind LH Side Of Instrument Panel, Instrument Panel Cluster Breakout
Splice S217: Dash Harness, Behind LH Side Of Instrument Panel, RH Side Of Steering Column
Splice S220: Radio Jumper Harness, Above Steering Column
Splice S221: Dash Harness, Behind RH Side Of Instrument Panel
Splice S222: Dash Harness, Behind LH Side Of Instrument Panel
Splice S223: Dash Harness, Behind LH Side Of Instrument Panel, RH Side Of Steering Column
Splice S227: Dash Harness, Behind RH Side Of Instrument Panel
Splice S228 (Less Vehicle Information Center): Radio Jumper Harness, Behind Center Of Instrument Panel
Splice S228 (With Vehicle Information Center): Radio Jumper Harness, In Console, By Radio
Splice S232: Dash Harness, Behind RH Side Of Instrument Panel
Splice S233: Dash Harness, Above Steering Column
Splice S234: Dash Harness, Behind RH Side Of Instrument Panel
Splice S236: Body Main Harness, Below RH Front Seat
Splice S238: Dash Harness, Behind LH Side Of Instrument Panel, RH Side Of Steering Column
Splice S240: Instrument Panel Harness, Behind LH Side Of Instrument Panel, RH Side OF Steering Column
Splice S241: Dash Harness, Behind LH Side Of Instrument Panel, Above Steering Column
Splice S243: Dash Harness, Behind LH Side Of Instrument Panel, At Starter Enable Relay
Splice S246: Dash Harness, Behind RH Side Of Instrument Panel
Splice S252: Dash Harness, Behind Center OF Instrument Panel
Splice S254: Instrument Panel Harness, Behind LH Side Of Instrument Panel, RH Side Of Steering Column
Splice S255: Instrument Panel Harness, Behind LH Side Of Instrument Panel, RH Side Of Steering Column
Splice S256: Instrument Panel Harness, Behind Center Of Instrument Panel
Splice S260: Dash Harness, Behind LH Side Of Instrument Panel, In P100 Grommet Breakout
Splice S261: Dash Harness, Above Steering Column
Splice S265: Dash Harness, Behind RH Side Of Instrument Panel
Splice S268: Dash Harness, Behind LH Side Of Instrument Panel, RH Side Of Steering Column
Splice S270: Radio Jumper Harness, Behind Center Of Instrument Panel
Splice S271: Radio Jumper Harness, Behind Center Of Instrument Panel
Splice S273 (Less Vehicle Information Center): Radio Jumper Harness, Behind Center Of Instrument Panel
Splice S273 (With Vehicle Information Center): Radio Jumper Harness, In Console By Radio
Splice S275 (Less Vehicle Information Center): Radio Jumper Harness, Behind Center Of Instrument Panel
Splice S275 (With Vehicle Information Center):Radio Jumper Harness, In Console, Near Radio
Splice S278: Radio Jumper Harness, Behind Center Of Instrument Panel
Splice S279: Radio Jumper Harness, Behind Center Of Instrument Panel
Splice S280: Dash Harness, Behind Harness, Behind LH Side Of Instrument Panel, RH Side OF Steering Column
Splice S281: Dash Harness, Behind LH Side Of Instrument panel, RH Side OF Steering Column
Splice S282: Instrument Panel Harness, Behind LH Side Of Instrument Panel, In Cluster Connector Breakout
Splice S283: Dash Harness, Above Steering Column
Splice S284: Dash Harness, Behind LH Side Of Instrument Panel, RH Side Of Steering Column
Splice S287: Anti-Lock Brake Harness, LH Side Of Luggage Compartment
Splice S290: Ashtray Jumper Harness
Splice S291: Anti-Lock Brake Main Harness, Behind LH Side Of Instrument Panel, Left Of Steering Column Support
Splice S294: Dash Harness, Behind RH Side Of Instrument Panel
Splice S296: Body Main Garness, RH Front Of Luggage Compartment
Splice S297: Dash Harness, Behind RH Side Of Instrument Panel, In Dual Sensor Breakout
Splice S303: Body Main Harness, Below RH Front Seat
Splice S304: Body main Harness, Below RH Front Seat
Splice S305: Body main harness, RH Front Of Luggage Compartment
Splice S306: Body Main Harness, Center Front Of Luggage Compartment
Splice S308: Body Main Harness, Below RH Rear Seat
Splice S309: Lear-Siegler Seat Harness, Below LH Front Seat
Splice S311: Body Main Harness, Below LH Side Of LH Front Seat
Splice S312: Body main Harness, Below LH Front Seat
Splice S313: Body Main Harness, Below LH Front Seat
Splice S314: Body Main Harness, Below LH Side Of LH Front Seat
Splice S315: Body Main Harness, Below LH Front Seat
Splice S316: Body Main Harness, Front Of LH Front Door Sill
Splice S317: Body Main Harness, Front Of LH Front Door Sill
Splice S318: Console Harness, Behind Gear Selector
Splice S320: Body Main Harness, Below LH Front Seat
Splice S321: Body Main Harness. Below LH Front Seat
Splice S323: Body Main Harness, Below RH Front Seat
Splice S324: Cellular Phone Harness, By Handset Connector Breakout
Splice S343: Body Main Harness, Below RH Front Seat
Splice S344: Body main Harness, Below RH Front Seat
Splice S360: Lear-Siegler Seat Harness, Below Center Console
Splice S361: Lear-Siegler Seat Harness, Below RH Front Seat
Splice S362: Lear-Siegler Seat Harness, Below RH Front Seat
Splice S363: Lear-Siegler Seat Harness, Below Center Console
Splice S364: Lear-Siegler Seat Harness, Below LH Front Seat
Splice S365: Lear-Siegler Seat Harness, Below Console, Near Console Seat Switch
Splice S366: Lear-Siegler Seat Harness, Below LH Front Seat
Splice S400: Rear Bumper Harness, LH Side Of Rear Bumper
Splice S401: Rear Bumper Harness, Center Of Rear Bumper
Splice S402: Rear Body Harness, RH Rear Corner Of Luggage Compartment
Splice S403: Rear Body Harness, RH Rear Of Luggage Compartment
Splice S404: Body Rear Harness, Near RH Tail Lights
Splice S405: Body Rear Harness, Near LH Tail Lights
Splice S408: Body Main Harness, Below RH Side Of Rear Seat
Splice S409: Body main Harness, RH Front Of Luggage Compartment
Splice S415: Body main Harness, RH Front Of Luggage Compartment
Splice S417: Body main Harness, RH Side Of Rear Bumper
Splice S419: Body main Harness, RH Side Of Luggage Compartment
Splice S450: Cellular Phone Harness Center Front Of Luggage Compartment
Splice S500: Body Main Harness, Center Front Of LH Door
Splice S501: Body Main Harness, Center Front Of LH Door
Splice S502: Body Main Harness, Center Front Of LH Door
Splice S505: Body Main Harness, Center Of LH Door
Splice S506: Body Main Harness, In Center Front Of RH Door
Splice S526: Body Main Harness, In LH Door, In Power Window Switch Breakout
Splice S601: Body Main Harness, Center Front Of RH Door
Splice S602: Body Main Harness, Center Front Of RH Door
Splice S605: Body Main Harness, Center Of RH Door
Splice S606: Body Main Harness, In Center Front Of RH Door
Splice S901: Header Harness, RH Side Of Windshield Header
Splice S902: Header Harness, RH Side Of Windshield Header
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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