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I have been reading about the EXT idle and how to wire it on here. Lots of threads but Ralph77's postings are what got me going. He made it work and look stock on his dash. I am not concerned with it looking that way, all I want is it to work.I figure it would cost me over a hundred dollars acquiring the parts on Ebay or elsewhere. If the correct parts find me then maybe. Instead I am going to use a simple toggle switch and place it in a hole I already have on my dash. There was once a problematic alarm system I disabled long ago but there is still a little red indicator light installed next to the gauge cluster and I can use that for the hole. First problem was locating and verifying the solid grey A-12 wire that is in the PCM harness connector #1. I opted to open the large wiring harness closer to the brake booster for room to grab the grey wire easily. You must be careful because there are several grey wires in that harness. Some have various tiny colored stripes and are hard to see. Then there is another solid grey wire that you MUST NOT get confused and cut. It is from the same connector #1 and position #7. By opening the wire harness where I did I was able to grab the grey wires and pull while looking to see if the A-12 wire at the connector moved. Once I verified the A-12 only then did I slice away a bit of the insulation to test it. I ran a wire with an alligator clip to a good ground and then touched the bare end to the A-12 grey wire while the engine was running. The idle jumped right up to 1000rpm. You guys were correct about that. Then I scrounged a length of double wire with a protective sleeve and cut what I needed from that. The ends I soldered to the grey A-12 wire and a black ground wire. The ground I attached with a ring terminal under one of the sheet metal screws that secures the PCM mounting bracket. Once I have sealed and shrink-wrapped the connections the rest of the wire can be fed through the fire wall through a grommeted hole someone already made for the alarm wiring. Then I can get a small toggle switch and solder the wires to that. For now I am sealing my solder connections with Liquid Electric tape. That is a neoprene sealing liquid I use on all my auto and boating wiring. It dries semi-hard and waterproof. Then shrink-wrap and electrical tape. Here I am so far:
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