Help! no power to aux fuse box
07-26-2016, 08:34 AM
#1
Instructor
Thread Starter
Help! no power to aux fuse box
1991 coupe automatic no mods. I drove to work and everything was fine. When I was going to start it to go home, I did not hear the fuel pump kick on and after it built up enough oil pressure, it started. I noticed I did not have the ac working (not sure if related to the problem). I replaced the fuel pump still no prime when key turned on. I finally took it to a shop and a friend told me that he charged the ac but it burns up the fusible link when the fan is turned on. He tried to trouble shoot and said that there is no power to the 2nd fuse box under the passenger knee bolster. He found that out after switching relays and trying to get the ac on. I have replaced the ac fan relay on the firewall, ac control head unit and the blower fan. Same result. Car will start after oil pressure builds up. Any suggestions greatly appreciated.
Last edited by pearlvette; 07-26-2016 at 08:46 AM.
07-26-2016, 08:40 AM
#2
i drove to work and everything was fine. When i was going to start it to go home, i did not hear the fuel pump kick on and after it built up enough oil pressure, it started. I noticed i did not have the ac working (not sure if related to the problem). I replaced the fuel pump still no prime when key turned on. I finally took it to a shop and a friend told me that he charged the ac but it burns up the fusible link when the fan is turned on. He tried to trouble shoot and said that there is no power to the 2nd fuse box under the passenger knee bolster. He found that out after switching relays and trying to get the ac on. I have replaced the ac fan relay on the firewall, ac control head unit and the blower fan. Same result. Car will start after oil pressure builds up. Any suggestions greatly appreciated.
missing is the year of this car!!!!
Last edited by WVZR-1; 07-26-2016 at 08:41 AM.
07-26-2016, 08:45 AM
#3
Instructor
Thread Starter
07-26-2016, 09:12 AM
#4
You mentioned AC RELAY "ON FIREWALL" - explain. The AC CLUTCH RELAY is to the LEFT of column "in car" generally just referred to as AC RELAY.
Do you or your friend have the FSM for a '91?
Also a '91 has two AUX fuse boxes I believe so it might be important to know which fuses are in what your friend refers to a 2nd.
Is the FP 1 FUSE in IP box blown? Bottom right I believe.
Have you replaced FUEL PUMP RELAY that's under right side of dash?
Do you or your friend have the FSM for a '91?
Also a '91 has two AUX fuse boxes I believe so it might be important to know which fuses are in what your friend refers to a 2nd.
Is the FP 1 FUSE in IP box blown? Bottom right I believe.
Have you replaced FUEL PUMP RELAY that's under right side of dash?
Last edited by WVZR-1; 07-26-2016 at 09:23 AM.
07-26-2016, 11:33 AM
#5
Instructor
Thread Starter
You mentioned AC RELAY "ON FIREWALL" - explain. The AC CLUTCH RELAY is to the LEFT of column "in car" generally just referred to as AC RELAY.
Do you or your friend have the FSM for a '91?
Also a '91 has two AUX fuse boxes I believe so it might be important to know which fuses are in what your friend refers to a 2nd.
Is the FP 1 FUSE in IP box blown? Bottom right I believe.
Have you replaced FUEL PUMP RELAY that's under right side of dash?
Do you or your friend have the FSM for a '91?
Also a '91 has two AUX fuse boxes I believe so it might be important to know which fuses are in what your friend refers to a 2nd.
Is the FP 1 FUSE in IP box blown? Bottom right I believe.
Have you replaced FUEL PUMP RELAY that's under right side of dash?
I thought only a main fuse box and a smaller aux fuse box with three relays(fuel pump) were the only two fuse boxes. Am I looking at this right? The 2nd fuse box is the one on pass side dash. Fuel pump relay was swapped with the other two located beside it. All fuses were checked in the fuse box located at the end of the passenger dash and the 2nd(aux) box under the passenger knee bolster. Those are the only two fuse boxes that I am aware of.
07-26-2016, 12:17 PM
#6
Here's the Fuse Box Images and also the RELAY arrangement from a '91 FSM
The following users liked this post:
pearlvette (07-26-2016)
07-26-2016, 02:57 PM
#7
Instructor
Thread Starter
Here's the Fuse Box Images and also the RELAY arrangement from a '91 FSM
Attachment 48003594
Attachment 48003597
Attachment 48003594
Attachment 48003597