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.
Temperature Switch Test
Disconnect temperature switch lead from distributor modulator valve and connect it to a test lamp with a good ground. Turn on ignition switch and warm temperature switch with hand or sponge saturated with hot water. Light should go on when switch temperature exceeds 65°F. If light does not go on, circuit is open or grounded or switch is faulty. Cool switch until it is below 49°F (an aerosol spray such as starting fluid should provide sufficient cooling), light should go out. If light does not go out, either it isn't cooled enough or switch is faulty.
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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