Advice needed - Chevelle Tech
Electrical & Wiring Troubleshooting electrical problems.

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post #1 of 14 (permalink) Old Jun 25th, 17, 7:59 AM Thread Starter
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Advice needed

I am completing an AAW update series wiring on a 68 SS car. I will need to check function and troubleshoot when Im finished. Is there a safer way than hooking up a large battery? Maybe a 12 volt 1 1/2 amp trickle charger? Will that work or is it too wimpy? Any advice is appreciated.

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post #2 of 14 (permalink) Old Jun 25th, 17, 11:18 AM
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Re: Advice needed

Outside of ringing out every wire in accordance with the schematic, no there is no other test. You can check each circuit individually by installing one fuse at a time. The trickle charger won't support most circuit loads.

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post #3 of 14 (permalink) Old Jun 25th, 17, 11:21 AM
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Re: Advice needed

The Painless instructions say to use a charger when testing.
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post #4 of 14 (permalink) Old Jun 25th, 17, 11:35 AM
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Re: Advice needed

Remove all the fuses from the panel. Then install a fuse holder between the positive battery terminal and the feed wire to the fuse panel (probably at the battery post wire to distribution point). Then install 5A fuse and turn on key. If there any shorts it will pop the fuse. If not, you can remove the fuse holder and begin installing one fuse at a time into the fuse block, check the circuit functions, them move to the next fuse.
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post #5 of 14 (permalink) Old Jun 25th, 17, 12:21 PM Thread Starter
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Re: Advice needed

Quote:
Originally Posted by MikeMalibu View Post
Remove all the fuses from the panel. Then install a fuse holder between the positive battery terminal and the feed wire to the fuse panel (probably at the battery post wire to distribution point). Then install 5A fuse and turn on key. If there any shorts it will pop the fuse. If not, you can remove the fuse holder and begin installing one fuse at a time into the fuse block, check the circuit functions, them move to the next fuse.
Nice 65 Mike. Now, I need to let you know Im not a electric kinda guy so be patient if dumb questions are submitted here.
1. If there are no fuses then what circuit am I testing when I do the 5amp inline straight to the box? ignition switch?
Thanks again!
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post #6 of 14 (permalink) Old Jun 26th, 17, 11:11 AM
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Re: Advice needed

that test will check that you don't have an issue with the wiring going from battery to horn relay and fusebox.
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post #7 of 14 (permalink) Old Jun 26th, 17, 11:53 AM Thread Starter
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Re: Advice needed

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Originally Posted by 04Z06vette View Post
that test will check that you don't have an issue with the wiring going from battery to horn relay and fusebox.


Makes sense.. thanks!
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post #8 of 14 (permalink) Old Jun 26th, 17, 8:25 PM
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Re: Advice needed

Quote:
Originally Posted by 04Z06vette View Post
that test will check that you don't have an issue with the wiring going from battery to horn relay and fusebox.
AAW classic update kit illiminates the horn relay. Would have to look at my AAW paperwork but think the power from the battery goes indirectly to the fuse box. IIRC the power goes from the battery to the starter. At that junction it goes to the alternator and to the fuse box.
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post #9 of 14 (permalink) Old Jun 27th, 17, 9:18 AM
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Re: Advice needed

Quote:
Originally Posted by blm View Post
AAW classic update kit illiminates the horn relay. Would have to look at my AAW paperwork but think the power from the battery goes indirectly to the fuse box. IIRC the power goes from the battery to the starter. At that junction it goes to the alternator and to the fuse box.
in that case, the test proposed above would check all that wiring prior to the fusebox. Still sounds like a good safe place to start.

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post #10 of 14 (permalink) Old Jun 27th, 17, 2:00 PM Thread Starter
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Re: Advice needed

Quote:
Originally Posted by blm View Post
AAW classic update kit illiminates the horn relay. Would have to look at my AAW paperwork but think the power from the battery goes indirectly to the fuse box. IIRC the power goes from the battery to the starter. At that junction it goes to the alternator and to the fuse box.



It does eliminate the horn relay on a conventional 68 car wiring. I got a purple wire that comes from outer firewall fuse box to starter/ battery cable post. Im assuming that wire needs to be checked to be sure. It goes to ignition switch and neutral safety switches on floor shifter on the inside fuse box.
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post #11 of 14 (permalink) Old Jun 27th, 17, 3:36 PM
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Re: Advice needed

That wire would be your main supply for your fuse panel.
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post #12 of 14 (permalink) Old Jun 28th, 17, 11:02 AM
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Re: Advice needed

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Originally Posted by Wallydog View Post
It does eliminate the horn relay on a conventional 68 car wiring. I got a purple wire that comes from outer firewall fuse box to starter/ battery cable post. Im assuming that wire needs to be checked to be sure. It goes to ignition switch and neutral safety switches on floor shifter on the inside fuse box.

the purple wire is only powered when you are cranking the key to start position. it goes from ign switch thru NS switch to starter solenoid to engage the starter. the big wire from battery directly to the starter actually powers the starter, but you can leave that one disconnected while testing your wiring as described above.

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post #13 of 14 (permalink) Old Jun 28th, 17, 11:29 AM
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Re: Advice needed

Wally, that first step with no fuses in the fuse block tests for any short you may have introduced anywhere in the wiring. It test more than just the link between the battery and its first connection. The assumption is that a mistake could be anywhere and this gross check will prevent what could be a flaming failure. It's a quick and easy check.

I forgot to mention that you should check the starter circuit early in your testing. If you followed the AAW instructions, the posts on the starter have tight wiring that could short if the nuts are not tightened carefully. It's worth taking another look up close just to confirm no cross contact on those post. I used a light and mirror because it's difficult on my car to see the top of the starter.

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post #14 of 14 (permalink) Old Jul 2nd, 17, 7:02 PM Thread Starter
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Re: Advice needed

Thanks to you all who helped here. I did plug it in and no fires or lightning strikes. I have to get a new wiper motor and washer pump. Mine isnt moving. Besides I think the one that is there is for a 69. It has been painted over and wiring looks 50 yrs old. Fan blower isnt working either. Its only money right??
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