Ob_one

Need help to properly ID my relays.. Here is my story...
Bought an 89 T/A that came from factory with a 5.7 auto the car had the TPI set up gone. Found a wrecked 90 Iroc on craigslist that I drove home with rebuilt 5.7 and trans that also had the TPI from factory. Transplanted the engine and trans in the mist of trouble shooting the start up on the 89 T/A with now the 90 Iroc engine and trans (changed out the knock sensor on the 90 engine to an 89 knock sensor as they are different the 90 iroc came with the map set up while the 89 comes with the mass set up)I swap out my relays thinking they were all the same. On my 89 the relays next to the brake booster the fuel is square while the other 2 relays Map power and the burn off are oval shape.
Here is what I have swap around a few times and I don`t know which is which any more.
My 89 T/A has a total of 5 oval relays under the hood. 2 behind the pass side headlight 1 near the heater box and the other 2 next to the brake booster.
I know for a fact that the two behind the passenger headlight which are oval are the factory ones which i have not mess with. There part numbers are
8280-14089936.

I have 5 oval relays that i have swap around and I need to properly id.
2 that came from the 90 Iroc engine harness and 3 from the 89 T/A (2 near the brake booster and 1 near the heater box).

8280-14089936
9256-14089936
9263-14103304
8277-14103304
1 with no part number at all ..

As you can see that the first 4 numbers change on both of these set and theres obviously a reason why GM did this.
I have checked the major on line parts suppliers such as Advance,AutoZone and RockAuto but they just have the basic 8 digits with out the first 4 digits.

camaronewbie

They should all be the same, as long as they fit into the connector (ie oval into oval, etc.)

If you type those numbers into the Autozone website (the numbers after the dash) and compare, across the board you get the same cross-reference Autozone part number.