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1991 Chevrolet R3500 Cheyenne, Safety Waveform
Blower Motor. A is voltage. B is current, probe set to 100mv/a. Current is measured at ground wire from fender well to negative battery post. KOEO. Decreasing voltage and current is from operating the blower speed switch from high ,medium then low.
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| Engine | 5.7 L / 8 cyl / GAS |
| Trans | 4-speed AutomaticTransmission (Electronic) |
| Delivery | Fuel Injection |
| Subsystem | Safety |
| Component | Other |
| Condition | Known Good |
References
Vehicle Data
1991 Chevrolet R3500 Cheyenne 5.7L
| Engine | 5.7 L / 8 cyl / GAS |
| Trans | 4-speed AutomaticTransmission (Electronic) |
| Delivery | Fuel Injection |
| Subsystem | Safety |
| Component | Other |
| Condition | Known Good |
Video