1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

12A Wiring Harness Streamlining

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Old 11-13-06, 09:55 AM
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12A Wiring Harness Streamlining

I'm currently running a Holley and no emmissions. This means that the majority of the wires on the wiring harness are unused and are now stored on the passenger side (tie wrapped up and out of the way). I was thinking of getting my hands on another wiring harness and removing the wires that are not needed so that I don't have the mess on the passenger side that I do now. Can I just clip the wires off the new harness or do I have to do something special to make sure they don't short circuit or send a false reading to sensors?

Thanks in advance.
Old 11-13-06, 10:04 AM
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Just grab the 2 passenger harnesses and un-unpin whatever you dont need, trim the lenght and re-solder. You need:
Alternator wire (one wire per harness)
Oil pressure
Water Temp

I dont use the oil pan sensors.
Old 11-13-06, 10:16 AM
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what's the oil pan sensor for? Low oil level? Sorry if i sound stupid
Old 11-13-06, 10:52 AM
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im pretty sure its the low oil level. speaking of which mine came on and then went off last night checked it and added some and everything looked fine ....odd i have no idea what it was.
Old 11-13-06, 11:03 AM
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GREMLINS RX-7s tend to have a host of them living in their underbelly
Old 11-13-06, 05:09 PM
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I sat down with the FSM and depinned the wires I didn't need. The manual shows how to do it. Thee are 2 sensors on the oil pan, sub-zero temp sensor, you don't need, I'd keep the low oil sensor.
Old 11-13-06, 06:10 PM
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By depinning, you mean I can just remove them from the main connector? I'll check out the FSM.

Last edited by legokcen; 11-13-06 at 06:23 PM.
Old 11-14-06, 12:03 AM
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i did this to a spare harness from a junkyard motor (just in case i kept the stock harness untouched), it makes the engine bay much cleaner
Old 11-14-06, 12:12 AM
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lol, the sa's dont even have a hole through the firewall on the pass side.
= no wires.
Old 11-14-06, 02:21 AM
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neither does my FB...it's routed around the front of the car along the crossmember to the passenger side.
Old 11-14-06, 04:43 AM
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Originally Posted by legokcen
By depinning, you mean I can just remove them from the main connector? I'll check out the FSM.
That is correct.
Old 11-14-06, 09:27 AM
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Originally Posted by Sgt.Stinkfist
i did this to a spare harness from a junkyard motor (just in case i kept the stock harness untouched), it makes the engine bay much cleaner

That's exactly what I'll do. Thanks for the picture too! Did you keep anything except the water temp, oil pressure and alternator wiring?
Old 11-14-06, 09:44 AM
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Keep in mind that appears to be a 2nd gen fusebox.
Old 11-14-06, 09:54 AM
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If I have time today, I will take pix of my engine bay for "show and tell."
Old 11-14-06, 02:39 PM
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the harness i depinned still has all the block sensors and alt. wires, emmision and carb. wires are removed
Old 11-18-06, 12:00 AM
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Old 11-18-06, 01:46 AM
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hey wacky, what fitting did you use for your filler cap vent?
Old 11-18-06, 06:53 AM
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Fitting? 3/8 maybe?
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