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.
1995 GMC Forward Control 4.3 Z, StandardFACTORY OEM SERVICE PROCEDURE
Wipers Do Not Operate In Hi
- Disconnect wiper motor/module connector. Turn ignition switch to ACC position and wiper switch to HI position. Connect a test light between ground and Purple wire of wiper motor/module harness connector. See Figure , Figure or Figure . If test light does not come on, go to next step. If test light comes on, replace wiper motor/module.
- Connect test light between ground and Purple wire of wiper switch connector located in instrument panel harness. If test light does not come on, replace wiper switch. If test light comes on, repair open in Purple wire between wiper switch connector and wiper motor/module connector.
Factory Service Tools
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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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