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Old 01-21-2010, 08:34 PM
Hellbilly Hotrods
 
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chevy powered RX7 wiring help needed

Ive got a full 18 circuit painless harness to put in an 89 RX7 with a stroked, aluminum headed small block Chevy and five speed, done by someone in the cars history. it rolled into my garage not running, with a burnt harness, and a box full of interior parts. at least most of the dash and sheetmetal was still on it. came with about 67lbs of pine needles too....

the goal is to be a street legal open track and occasional drag car. to that end, i will be retaining the headlights, taillights, turn signals, horn, heat, and sunroof. other than that, its pretty much motor and brake lights. maybe even the stereo and cigarette lighter, but the jury os still out on that.

ok, the way its looking is that i will need to retain the CPU for the lighting system to operate properly. is this correct? is there any way around this?

the car was pretty well hacked. not much in the way of electrical was salvagable. i have managed to get all the factory switches and controls, but not a good harness. so ill still be using the 18 circuit painless.

this is not my first wiring harness, but it is my first on a late model. (wow, im getting old when 1989 is a late model)

anyone have a solution for the lights without a CPU and using factory switches?

also, the fuel sender is 6 ohms full, 110 empty according to what ive found. what have you guys run for a gauge other than the factory? all the rest of the gauges are autometers, and i would like to match them.

thanks for any help you can give me.
michal

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Old 01-22-2010, 08:06 AM
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Quote:
Originally Posted by dusterbd
Ive got a full 18 circuit painless harness to put in an 89 RX7...
This is very general, obviously. It might give you some points to ponder.

The OEM switches could be integrated into the Painless loom, but unless there's a real desire to do things that way, you might consider buying or making a proper switch panel w/the necessary switches.

I would do away w/the processor and if the OEM switches were to be used, use them to operate individual relays.

AFA the fuel gage, I'd go to the tech line @ Autometer and pester them! lol No, but if anyone would know, I'd be them or the guys @ V8 RX-7 Forum.

Good luck and keep us posted!
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Old 01-22-2010, 08:15 AM
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Quote:
Originally Posted by dusterbd
anyone have a solution for the lights without a CPU and using factory switches?
How, exactly, does the computer control the lights? Is it for dimming or twilight sentinel types of things? If so, you can eliminate the computer and simply wire the light circuits to the switches (using relays as required). If the computer is doing something more, I'm afraid I have no idea what that might be.
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Old 01-22-2010, 11:18 AM
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AFAIK, the PCM has nothing to do w/the lights unless you count the MIL.

Wiring harness info- CLICK HERE.

THIS shows all the functions controlled by the PCM that have an effect on a swap.
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