1999 GMC W4500 Forward W4S042 5.7L Charging System Wiring
capable of 14.2 volts with blue and white wire jumped to 12 volt supply and will carry all loads on truck while supplied with 12 volts I would like help with a wiring diagram including charge relay and fuse (in dash)
FIX posted 1/29/2018
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Message Closed w/FIX
Vehicle Data1999 GMC W4500 Forward W4S042
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Message Closed w/FIX
Vehicle Data
1999 GMC W4500 Forward W4S042
VIN | 4KDC4B1R6X |
Engine | 5.7 L / 8 cyl / GAS |
Delivery | Fuel Injection |
Affected | Charging System Wiring |
Conditions | Low Charge |
Misc. | Box Truck |