Electrical short -somewhere - Team Camaro Tech
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post #1 of 4 (permalink) Old Dec 26th, 06, 11:10 AM Thread Starter
 
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Electrical short -somewhere

Working with my son to rebuild his 86 Z-28.. Recently we overhauled the entire brake system, and were forced to JACK up the body a few inches , to gain clearance for bleeding off the brakes. Since the car was lowered and has been on the roadway for about 4 days..and we use a farm lane for access--all potholes The fuse that feeds the gauges for fuel, electric ,water and oil or Block 9 just blows out. In checking the connectors at all but the Fuel sending swith / float ...IS IT possible that when we raised up the car--we crushed a wire leading to the sending switches? The fuel pumps works fine and I have disconnected the wire harness from the ignition . Each time-- replace the fuse, turn on the ignition and the pump activates and then SNAP! At one point--the fuses melted .. If this is not the problem--are there any pigtail wires that may have been crushed?
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post #2 of 4 (permalink) Old Dec 31st, 06, 05:42 AM
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Re: Electrical short -somewhere

Does the fuel gauge and pump work properly or so intermittent problems? If that wire was crushed and shorted out the pump and gauge would be your indicator that is where to look.

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post #3 of 4 (permalink) Old Dec 31st, 06, 05:52 AM
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Re: Electrical short -somewhere

trace the wires back


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post #4 of 4 (permalink) Old Dec 31st, 06, 11:47 AM
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Re: Electrical short -somewhere

I originally thought there might have been a short in the wiring to the fuel pump, since Casey said that the fuse was blowing after the ignition key is turned to the on position. The first thing I thought was that the fuel pump was the problem, because it took a few seconds to "Pop" which is the amount of time it takes for the pump to prime the engine. I told Casey to look for the short somewhere along the wiring leading to the fuel pump. He told me that he drove the car around the block with no problems. That pretty much eliminates the fuel pump.

The best way to find your problem is to isolate the circuit by removing the fuse or after it blows... checking to see what accessories are fed through that fuse. You already said that it is block 9 for the instrument panel gauges which you will have to pull the dash to locate the problem. I would first go the easy route and double check the wiring at each of sending units to make sure that the wiring is okay before pulling the dash. Look for loose wiring that might have come in contact with the hot exhaust and burned through exposing the bare wire(s). You also said that you bled the brakes which might or might not be related to the problem.....it's posible that something related to the braking system went haywire. I hope this helps. Good luck and hope you can find the problem soon!

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