I have a 88 GTA 350 does anyone know what these relays are for, or where i could find out, i believe one is for the fuel pump and another for the a/c.

or if i can find a book or something to tell, anyone know where to get the info. Thanks

 

Along the firewall in that location are several relays. For your '88, one is for the fuel pump, one is for MAF power, one is for MAF hot wire burnoff, and the larger one should be the headlight door isolation relay. There may be another smaller relay for the driving/fog lights a bit farther forward along the left inner fender.

It's easiest to identify the relays by the wire colors. Many of the relays are marked (if they are factory relays) but they are also interchangeable, so their positions may have changed. The wire colros will identify the circuitws they control.

 

where is the fuel pump relay for 1991 350 engine? it is not where the fan relays are... Thanks.