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.
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HOMESERVICE MANUALSPORSCHE1982928 AUTOMATIC TRANSREPAIR AND DIAGNOSISENGINE PERFORMANCEIGNITION SYSTEMBOSCH ELECTRONIC IGNITION SYSTEMTESTINGRESISTOR RESISTANCE CHECK
1982 Porsche 928 Automatic Trans
Resistor Resistance Check
1982 Porsche 928 Automatic TransSECTION Resistor Resistance Check
NOTE:
This test does not apply to Mercedes-Benz vehicles.
Set an ohmmeter in the low scale. Be sure ignition switch is "OFF". Check resistance of each resistor in the primary circuit. See Figure. Some manufacturers use resistor wires instead of ballast resistors. Most use 2 ballast resistors.
RESISTOR RESISTANCE SPECIFICATIONS
| Application | Ohms |
|---|---|
| BMW | 0.4 and 0.6 |
| Fiat | .85 -.95 |
| Porsche | 0.4 and 0.6 |
| Volvo | 1.0 |
RENDER: 1.0x
NO RELATED
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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.