Jay Johnson

iTrader: (16)

I'm looking for the pinout info for the ASA racing pcm. I used to have an ASA
manual that had all the info plus the pinpout, but I can't seem to find it now.

thanks,


Jay Johnson
jayjohnson@rocketmail.com

Jay Johnson

iTrader: (16)

I have received an email from a fellow that may be able to provide me the pinout for
the ASA pcm. He may get back to me in a day or two.

Anyone else have the ASA engine handbook with the pcm pin-out?

I lost the manual that I aquired in 98. It had all the info that I need


Jay Johnson
jayjohnson@rocketmail.com

moespeeds

I know this is a 12 year old thread, but does anyone have this info? I'm now looking for the pinout diagram for an ASA harness. I'm upgrading to a 2001 PCM, and using a 1998 Camaro diagram. So far so good, but on the ASA harness I have wires in the RED #64 and #70 locations but these are listed as "unused" in every 1998 diagram I've come across.

aknovaman

iTrader: (7)

http://mrk-motorsports.com/pdf/1998%...1999%20PCM.pdf

http://lt1swap.com/1998_ls1_pcm_pinouts.htm

moespeeds

So I already have both of those diagrams. The problem I'm having is I'm upgrading an ASA car to a 2001 PCM. I have wires in the red #64 and #70 locations, but none of the 98 diagrams show these pins as being used. I was wondering if they hijacked them for something in the ASA harness.

aknovaman

iTrader: (7)

All of my documents including Mitchell don't show any wires in 64 or 70. You may need to track them backwards in your harness to see where they go. I have my standalone harness spreadsheet that I use and it does not list them either.

What color are the wires?

moespeeds

Both black.

moespeeds

A buddy had a diagram that showed the #64 as oil pressure sensor ground. Nothing for 70 though.

aknovaman

iTrader: (7)

Likely grounds for coils, maf, engine sensors like tps, etc. Get a meter and ohm them out.

moespeeds

Ok thanks. Right now there's no engine in the car so I'll wait until everything is hooked up.

aknovaman

iTrader: (7)

Then now is better time to check wiring when engine is out.

moespeeds

So I ended up with 8 extra wires by the time I finised. I checked continuity with all of these against every essential plug in the engine harness. I had continuity with 2 wires, 98 harness Blue 11 and Blue 77. Blue 11 went to the center wire on the 3 wire Alternator plug, and Blue 77 went to one of the outside wires on the Alternator plug.

aknovaman

iTrader: (7)

I vaguely remember a couple 98 harnesses I stripped down had a wire that went out of the PCM and looped back into it serving no purpose whatsoever ever. Also note, the 98 engine temp sensor in the driver cylinder head has a 3rd wire (green) that feeds the dash gage.

moespeeds

Looking at the schematic for a 98 camaro Alternator, I'm thinking those 3 wires going to the Alt will be switched 12v, idiot light, charging gauge. Looks like the 98 alt grounds through the body so I don't think any of them could be a ground, but I'll try to trace them tonight. In the 2001 harness there is a pin marked "Alternator ON" which I didn't use. This could be used as my switched 12v to activate the alternator, correct?

aknovaman

iTrader: (7)

Connect red pin 15 to the alternator L terminal, done. Never connect the L terminal directly to switched ignition. That will destroy the regulator. It must be connected to a 12 volt lamp or about a 1k ohm resistor.

moespeeds

Gotcha. So what will run the charging gauge? I dug up this schematic which looks like what I have currently:

http://img.photobucket.com/albums/v4...ercharging.gif

aknovaman

iTrader: (7)

Charge gage? Whats that? Factory f body has a dash cluster voltmeter. Wiring it like i said will make the alternator function as factory. Not sure why you would need anything else.

moespeeds

This is an ASA Stock Car, a tube framed race car. They built them using the 1998 Camaro Harness, and the GM "ASA" PCM, for which I can't seem to find a pinout but it's supposedly just a 1998 Camaro PCM. The car has an Alt voltage gauge (voltmeter) to show charging volts, and an idiot light for the Alt.

aknovaman

iTrader: (7)

So wire the idiot light to the akternator L terminal and connect the voltmeter to any switched ignition.

Also, check your pm. I can save you some frustration.

moespeeds

Got it, thank you for all your help I do appreciate it.