I love this forum, first and foremost lol.
I also have a 95 Chevy Astro 2WD. I went to Autozone to buy a new relay. I didn't take the old one with me. So the guy sold me a relay that's different then the one on the firewall. if you go to Autozone, O'Reilly, NAPA, or even just a google image search for the 95 Fuel Pump Relay, there's pics of a different relay then the one that's in my van.
Here is where my relays are, i don't have 3 of them next to each other, the 3rd one is under the bulk of the wiring to the back of where the AC unit is.
The 95 is an animal unto itself. The f/p relay is located under the hood, passenger side, over the heater box area. If you find you need
a new relay, definitly take the old one with you to the store to match up, else you will come home with the wrong part. Don't ask why...
What you need to find out is with the connector removed from the relay, when looking for 12v with either a meter or light: 1) is there one
heavy wire in the connector that has constant 12v ? 2) is there one smaller wire that shows 12v for 2 seconds when the key is turned to ON ?
If the above two things aren't happening, then there is either a wiring, fuse or PCM problem. If you have 12v as stated above, and with the
relay plugged into its' connector, and the test light stabbed into the single female "test connection" that is in the wiring bundle and just to the
left of the relay (grey wire): when the key is turned to ON, does the tester show 12v for 2 seconds ? If it does, then the 'prime' function of the
system is good, and the engine should want to start. Another way to tell if the pump is running, would be to put your ear to the fuel filler (cap
off) and listen while the key is turned to ON. The pump should hum (no particular hit parade song) for the 2 second prime.
Check things out as outlined above, and then get back with some results. (OK ?)
Uncle Bob
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