1971 Buick 455 HEI wiring questions - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 01-09-2005, 09:06 PM Thread Starter
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1971 Buick 455 HEI wiring questions


1. This looks like a self contained HEI unit. Do I only have to hook up the positive wire from the ignition switch to the positive side of the coil?
2. Do I have to ground the neg. side, or is that just for the tack hook up?
3. How do I tell which side of the coil is positive. (the coil is attached to the dist. cap)
4. What is the firing order? Anyone have diagram of the dist and block with the firing order numbers on it?
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post #2 of (permalink) Old 01-09-2005, 09:59 PM
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Re: 1971 Buick 455 HEI wiring questions

1. Yes.
2. No. (Yes that's for the Tach)
3. They are labled.
4. 18436572



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Dale
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post #3 of (permalink) Old 01-09-2005, 10:47 PM
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Re: 1971 Buick 455 HEI wiring questions

The ground for the HEI system is the mounting screw on the module. Make sure it's clean and tight. No other grounds needed.
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post #4 of (permalink) Old 06-07-2005, 09:01 PM Thread Starter
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Re: 1971 Buick 455 HEI wiring questions

Does this system require a resistor or does it take the full 12 volts?
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post #5 of (permalink) Old 06-07-2005, 09:31 PM
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Re: 1971 Buick 455 HEI wiring questions

Full 12 volts direct from the ignition switch - use at least a 12 gauge wire to the terminal on the side of the cap marked (+) or Batt - preferably a 10 ga. It's power hungry.
The other terminal is for a Tach.
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