josev117g

Hello i've here for a long time firat time posting and i have a question about the under dash harness for my 89 Trans Am convertible 5.7 tpi auto trans... im the third owner and ive had the car for a year working on it and when i thought i had it ready more probles showed up...oh well thats how this cars are i guess. Well on to te problems...after driving the car for about an hour the gauges would die and the car would heat up and my interior electronics would shut down so i started looking under the dash and i began to find few spkiced wires and bridged connector the thing was that the further i looked the more and more splices i found till it got to the point where i had to take off the whole dash to be able to see them all and it was alot the worst was when i saw that in some cases 5 wires were splices to 1 and they were just twisted and had duct tape holding them so needles to say i tried to put them back as best i could. but mi question is i got a hold of a 91 formula 5 speed full harness and was wondering if it was a direct plug and play or what i could do to make it work plz if any one could give me some info on this

alex722607

iTrader: (3)

Off hand I know that the starter wiring maybe slightly different. Auto runs the starter engage wire through the fear selector, manual runs it through the clutch pedal position sensor - IIRC. also there is a park nuetral position wire that runs from the gear selector on the auto to a connector under the dash and then the the ECM. Basically you are going to have to run all the wires to the gear selector.

josev117g

Thank you thats is helpfull to know. I apreciate the help