Question about 1991 Chevrolet Camaro

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20 amp fuse in ACC fuse block slot blows everytime the key is turned on. Kills the whole electical system even when hooked by cables to a running car. How can I track down this short?

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Replace the fuse with a test light , then search circuits till the light goes off

Posted on Jul 04, 2010

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Why does my 20 amp fuse blow when the engine is running, but work without issue when the engine is off?


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If you use too large a fuse, the wiring can catch on fire, and the whole car could burn up. You'll need an auto electrician to trace that problem. You can remove any bulb and unplug any device that is on the Acc(essories?) circuit; then see if a fuse will stay; start replacing items till you blow the fuse. It seems like a dead short which can surely melt wires if you keep taking chances. good luck.

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My 80 amp fuse blows everytime i hook up my battery


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Since most of the circuits are handled by the key switch, you'll have to disconnect a few fuses and relays to find the overload.

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I have a 1984 gmc 1500 with a 6.2 diesel. it has a manual glow plug set up on it hooked up to a toggle switch. if i flip that on i can hear the glow plugs kick on and the light on the dash comes on. other...


There should be 2 rubber blocks in the wire harness down by the starter. These are fusible links and one kills power to the truck, the other kills power to the engine. Cut them out and splice the wires back together, one at a time of course. Old age will do them in on occasion, moisture gets in there. Use some "heat shrink tube" to cover the splice. It works much better than tape. Hope this helps.

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20 amp fuse in ACC slot keeps blowing


ACC slot is the Accessories slot. Perhaps there is a short or overload condition in the vehicle with the cigarette lighter or an add on electronic device.

Try to connect the two posts of the solenoid to see if bypassing the key cylinder works the starter. If it does, then this points to the key switching problem for the starter to the solenoid.

Also, check the neutral/back up safety switch:
Neutral Start/Back-Up Light Switch REPLACEMENT & ADJUSTMENT
  1. Remove the console trim from the console.
  2. Disconnect the electrical connector from the switch.
  3. Remove the 2 attaching screws from the switch and remove the switch. Fig. 1: Neutral start/back-up light switch 85347017.gif

  4. To install a new switch:
    1. Place the switch onto the transmission control shifter and loosely install the attaching screws. Position the transmission control shifter assembly in the N notch in the detent plate.
    2. Assemble the switch to the transmission control shifter assembly by inserting the carrier tang into the hole in the shifter lever.
    3. Install the attaching screws and tighten.
    4. Move the transmission control shifter assembly out of N position. This will shear the switch internal plastic pin.
  5. To install the original switch:
    1. Place the switch onto the transmission control shifter and loosely install the attaching screws. Position the transmission control shifter assembly in the N notch in the detent plate.
    2. Rotate the switch on the shifter assembly to align the service adjustment hole with the carrier tang hole. Insert a 3⁄32 in. (2.38mm) diameter gauge pin to a depth of 9⁄16 in. (15mm) and tighten attaching screws.
    3. Remove the gauge pin.
  6. Connect the electrical connector to the switch.
  7. Install the console trim to the console.

Jul 04, 2010 | 1991 Chevrolet Camaro

1 Answer

1996 olds acheiva electrical problem


Hi,

Other than the dome light, all of the other electrical you posted operate using the ACC terminal of the IGN switch. The most likely then would be a loose connector either of the wiring harness, relay base or fuse holder fed by the ACC B+. Determining which is a matter of tracing the wiring from the ACC terminal to the fuse box/feeder (in some instances, there would be a relays likewise). From the fuse box/feeder it would go to the different fuses for the radio, defogger, auto door lock. The fuse(s) may be OK but their connectors might be loose and/or the main connector that feeds the fuse box/feeder being the common denominator.

The dome light should work even with no key in IGN swtich turned to ACC. But then again, it is fed from the fuse box/block straight from the battery's + terminal. Which leads back to the connector to the fuse box/block. Your best bet would be to remove/reconnect the different connectors going to and from the said fuse box/block.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Jun 09, 2008 | 1996 Oldsmobile Achieva

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