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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSFORD1994F 250 2WD PICKUP L6-300 4.9LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONPINPOINT TESTSKM - WOT A/C CUT-OFF (WAC) A/C DEMANDKM62 - CHECK A/C ON CIRCUIT FOR SHORT TO POWER
1994 Ford F 250 2WD Pickup L6-300 4.9L
KM62 - Check A/C ON Circuit For Short to Power
1994 Ford F 250 2WD Pickup L6-300 4.9LSECTION KM62 - Check A/C ON Circuit For Short to Power
- Key "OFF".
- A/C relay disconnected.
- Disconnect Powertrain Control Module (PCM). Inspect for damaged or pushed out pins, corrosion, loose wire, etc. Service as necessary.
- Install breakout box, leave PCM disconnected.
- Key "ON", engine "OFF".
- Measure voltage between test pin 54 at the breakout box and chassis ground.
- Is voltage less than 1.0 volt?
Yes -- Go to KM63. KM63 - Check A/C ON Circuit For Short to Ground
No -- Service short to power. Remove breakout box. Reconnect all components. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.