Wiring idenification

[Bill Howell]

I am looking for something that either I am not explaining correctly or it just doesn't exist.
I have a 72 cutlass I am redoing. I need a diagram (not schematic) or drawing that identifies the wires coming out of the fuse box on the firewall (engine) side. Specifically, the engine harness side. I am going Dakota Digital with dash, LS and new harness for engine. I need to figure out which wires I need to retain and which wires will no longer be needed in that part of the harness coming out of the fusebox under the hood, hence a chart that identified each wire would be really helpful. Like most 43 year old cars, most of them were unhooked by the time I got the car so hard to cipher what they all do. Anyone got any suggestions?

[130fe]

Bill, use the dakota digital BIM obd2 module. Plugs into the obd2 plug and you get almost all of the engine readings.

[Bill Howell]

??? Chris. I have the VHX gauges for the car. Remember I am slow here. You are saying there is something that will connect to the OBD2 and not need the other control deal I have now? the one you have to put all the different sensors in and run separate wires? Sorry so dumb.

[130fe]

No problem Bill LOL. This is the one-
http://www.dakotadigital.com/index.c...rod/prd752.htm

You still have to use the "control panel" that has the wires you connect to. The module above goes in between thobd2 connector and the VHX control panel. It's saves you quite a bit of time not having to run the wiring for the engine readings.

I bought a obd2 Y cable off of amazon or EBay (can't remember) so that way you can hook a scanner/code reader up to it.

Are you using a GM performance harness? I did and with it, using the factory oil pressure sender, it comes straight off of the PCM. You might have to run that one separately.

You still have to connect the following wires (from factory harness)
High beam- light green
Turn signals - light blue and dark blue
Ign
battery
Ground
Dash lights (don't know that color)

I am sure there are a couple that I can't remember off hand. I assume you are using the VHX ones, you can also wire in a shift light. I used an LED and put it in my old high beam indicator (not sure how yours is set up.

I rewired my car at the same time using a AAW classic update and wired in the DSE wiper. When I get back home on Tuesday I will post of the picture of how I re-routed the wiring through the factory bulkheads.