Today i went to install a manual fan switch...all of the sudden car wont start. There was two green w/ white stripe wires on my drivers side firewall, so i tested the first one...ground into it...turned key...car turns over but wont fire...so im like oh ****...i guess ill try the other one...so i go to ther other green/white wire and ground it...car wont fire...then the car starts for a sec and dies again but the fan turned on...so i knew this was the right wire...Car wouldnt start so i took off all wires...everything should be back to normal...still wont start. I flashed the ecm and got code 54 "Low voltage at fuel pump OR
Low voltage at Fuel pump relay OR
Output failure at quad driver module" but i had this before and car always started fine. Any suggestions??? I need to get it started.

 

Josh, did you ever find out what was wrong or what that relay was for?

ODB

 

No im still stumped. The reason im stumped is because i didnt cut the wire or anything...all i did was take a little plastic off and ground the wire. I thought maybe grounding the wire blew a fuse or something, but all my fuses are good. Dont know, im about to go look at it again though and see what i can do.

 

was there any kind of problems before you tried this?

 

I had the code 54...and every once in a great while ...like maybe twice in the last 4 months, it would die right after i started it up...but then would start again just fine. I just had my fuel pump replaced like 4 months ago. I was thinking maybe since i grounded the wire i blew a fuse...but doesnt look like it. Is the fuel pump fuse in the regular fuse block under the dash? I dont see the fule pump fuse there, and i wonder if i blew that fuse or something. Ugghh....this is annoying.