wireing problems
 

i got a harness off of ebay for my 88 ECU and it does not fit. the plugs on the ecu is smaller then the harness plug. why is that? they are the same year, does it matter? or does the nummber on the ecu and harness got to be the same? can any one help

The plugs on the ECU should be yellow if its an 88. Also the plugs from the harness that plug into the ECU should be yellow also. If they are grey, then you have a mismatched harness and ECU. You need to have the same year engine, ECU, wiring harness, and chassis for it to be somewhat plug and play.

87-88 - Yellow plugs
89+ - Grey plugs

i think it also depends on which trnny you have also