Engine wiring harness question - Chevy Impala SS Forum
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post #1 of 23 (permalink) Old 07-07-2016, 12:41 PM Thread Starter
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Engine wiring harness question

After doing over an hour of research I couldn't find what I was looking for, so I created this thread. I just swapped out my engine harness and was trying to figure out where a few connectors go. A red connector by alternator. And three connectors by driver side cylinder head. See pics
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post #2 of 23 (permalink) Old 07-07-2016, 03:02 PM
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The white/purple one looks like MAF to me. The blue one ether to the coolant temp on water pump,or AIR system that may not be there anymore. The one upper right looks like the one that plugs into the pressure switch on the power steering line. The red one on the other side looks like EVAP solenoid/switch. The harness may,or may not have differences if from another year car...

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post #3 of 23 (permalink) Old 07-07-2016, 03:24 PM Thread Starter
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The connector to the Evap solenoid is already plugged up. The red connector actually sits closer to the alternator
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post #4 of 23 (permalink) Old 07-07-2016, 03:28 PM
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Righto on the red/blue on the pass side. either the EGR solenoid or EVAP solenoid - can't tell which is which but it's only gonna plug in one of them. And yah there's NOTHING near my alternator like that.

The blue one on the driver side is tyewrapped on mine - I believe it's the removed AIR pump.

EDIT: How bout combing the stickies for the WDs and going by the wire colors?

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Last edited by 96 Black; 07-07-2016 at 03:30 PM.
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post #5 of 23 (permalink) Old 07-07-2016, 03:37 PM
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Or,simply try plugging them in. Most connector shells will not allow being plugged into the wrong device,and there really aren't that many devices to plug into anyway...
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post #6 of 23 (permalink) Old 07-07-2016, 03:39 PM
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If you got this harness from a totally different platform like an F-Body,or Corvette then shame on you. Expect all kinds of problems getting stuff to plug into where they belong...

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post #7 of 23 (permalink) Old 07-07-2016, 03:53 PM Thread Starter
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The guy I bought it from said he got it out of 96 B-Body; either SS or Roadmaster
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post #8 of 23 (permalink) Old 07-07-2016, 04:13 PM Thread Starter
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Do the power steering pumps have connectors?
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post #9 of 23 (permalink) Old 07-07-2016, 04:20 PM
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Quote:
Originally Posted by 1slow96 View Post
... The one upper right looks like the one that plugs into the pressure switch on the power steering line. ....
You mean this one he mentioned?

Hey, do you already have something plugged into your A/C? Mine's way too dirty to tell any colors, either the wires or plug.

\'96SS SOB: SSRI, Herter Tune, Tri-Y II, , 3000 Edge, F/HO bars, METCO extendeds with CV MMC, Bilsteins, currently Vredestein Ultrac Sessanta (315/35 rear). Finally, wait for it... LT-4 knock module!
\'96FWB BUW-Butt Ugly White: PCMPerformance tune, HDFA w/ swissed filter, 1/2 SLP s.s. catback with H- and Flow Super 50s, oem opti rebuilt 3 times, SS Bars, METCO LCA, Airlift 1000, Monroe SS, PowerTrax No-Slip, CTS wheels with +1 rubber. Finally, yes again... LT-4 knock module!

Last edited by 96 Black; 07-07-2016 at 04:29 PM.
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post #10 of 23 (permalink) Old 07-07-2016, 05:23 PM
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Quote:
Originally Posted by YoungLionJacq View Post
Do the power steering pumps have connectors?
The pump itself, No. But there is a pressure switch on the line over near the steering gear (driver side of car)

Quote:
Originally Posted by YoungLionJacq View Post
The guy I bought it from said he got it out of 96 B-Body; either SS or Roadmaster
Is your car also a 96 car? If not, you will have some connectors that will be left over....CPS, extra O2's, etc. but as 1 slow indicated, there really isn't much to hook up on these cars and most are keyed to plug into a specific sensor. Did you match up your old harness to this one before installing just to confirm they were the same? I would hope so, but if not, start back at the basics and match up the harness/connectors.

You really can't trust what someone told you. Either they lied, don't know for sure themselves or someone told them incorrectly or lied to them. Another option, back track from the sensors. Look closely at the engine and the sensors on it. Which sensors don't have a plug connected to it? Maybe this will help you eliminate the possibilities.

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