Electrical HELP!! - Team Camaro Tech
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post #1 of 4 (permalink) Old Dec 5th, 09, 02:33 PM Thread Starter
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Electrical HELP!!

My 68 is not starting up. It will crank, but not start. I jumpered a wire directly from the battery to the ballast resistor and it started.

A little background info:
Mallory unilite distributor with electronic module (no points). It uses a ballast resistor and the stock resistor wire. This has all worked perfectly in the past, but now the resistor wire gets very hot. I think this means I have a short somewhere, but I not sure where to even start to look for that.

I have recently swithed to a newer style alternator and eliminated the regulator.

I have a couple questions about possible solutions.
1. I have read that I dont really need the resistor wire any longer on my set-up. Where on the fuse panel would be a good place to run a new wire to ballast resistor?

2. What should be the voltage reading at the ballast resistor with the ignition on, but not running?

3. What wiring harness would I need from AAW if I wanted to replace the fuse panel and engine harness only?

Thanks all,

1968, 383, 700R4, Convertible
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post #2 of 4 (permalink) Old Dec 5th, 09, 03:43 PM
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Re: Electrical HELP!!

Question 1. The spade labelled IGN on the fusepanel. Maybe add a 20 amp inline fuse also.
Question 2. Battery voltage +/-1 volt.
Question 3. Engine harness. You'll have to check with AAW on the fusepanel.

The reason the resistive wire gets hot is because current is flowing through it, a fair amount. This current goes through the coil primary winding to develop the field to be induced into the secondary winding generating the high voltage needed to jump the spark plug gap when the current stops flowing through the primary side.

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post #3 of 4 (permalink) Old Dec 5th, 09, 05:36 PM
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Re: Electrical HELP!!

heres the simple answer. its gonna get a little hairy, but u need to follow that resistor wire and find out where it goes. that wire will burn EVERYTHING its wrapped with in your harness. the wiring harness is beyond a hard task and is expensive to replace unless your an expert. the resistor wire is either grounding out against another wire from friction, or whatever its connected to is fried. DO NOT turn the key over until you fix that issue. u dont want to end up replacing more than you need to.

take it from me, 87 jeep cherokee on fire.

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post #4 of 4 (permalink) Old Dec 5th, 09, 08:14 PM
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Re: Electrical HELP!!

One other thing, You have twice the resistance at the coil than it's designed for. Cars that run ballast resistor aren't feeding it with a resistor wire and cars with resistor wire don't normally need a ballast resistor.

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