Electric problems

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Electric problems

Home > Discussion Forum > Mechanic's Corner (general)

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All Messages in Thread	Author	Date
Electric problems	Earl	10-26-09
I have a 98 s-10 pickup, reg cab 4cyl, I recently aquired this truck and have noticed a pretty serious problem. The brake light fuse blows out, but only when the truck is running. I installed a new brake light switch and have checked the wires from front to back but cant seem to find the issue. Along with this the abs light on the dash is on but the truck stops on a dime. One other note is the turn signals act up as well, when they do the flasher squeals, but only when the left one is used.
Re: Electric problems	Vern	10-26-09
You'll probably need to chase the wire loom all the way back along the frame. There is a place where the wire is touching the frame. Vern
Re: Electric problems	Eric	10-31-09
Earl - The ONLY thing that will blow a current limiting device (fuse) in an automotive system is a short to ground (e.g., the hot lead (+12v) touching ground (in a car or truck that is any metal not insulated by non-metalic fastners from from the body, frame, or motor). Since you state it only happens when the truck is running, it suggests that (1) the bare wire is somewhere that it is unprotected (by the black tubing around some wire harnesses) and can move with the vibration caused by the engine running, road vibration, air flow in the area, or rotation of motor or wheel assemblies: or (2) water accumulation that moves around when the car is running and completes the circuit to ground when it comes in contact with the bare wire running from the brake switch to the brake lights. The easiest solution is to run a new wire from the brake light switch to the tail lights. If the fuse still blows, look for water in the tail light assemblies. I would suggest running the new wire, because, there is a remote chance that inside one of the protected wire bundles a wire from a frame member to connect and insulated accessory could be chaffed so that they can touch in the presence of vibration, motion, or air flow. Hope this will help you locate and/or fix your problem. Eric
Re: Electric problems	Clarence Guidry	11-1-09
Need help with the generator connection of a 1988 ford jamboree motorhome. I am also having problems getting the tail lights to work. I checked the fuses under the dash, and the light sockets on the back, but they still will not work.
Re: Electric problems	colin parkes	11-5-09
I am trying to replace the coil and the condensors I can seem to figure out where the wires go is there some schematic I can print out
Re: Electric problems	colin parkes	11-5-09
I have a 1988 motor home with an onan generator model # 4.obge-1r/26100e serial # 1870922397 I am trying to replace the coil and condensors but need the wiring diagram dc ignition

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