94 Aerostar fuse 5 blows
#1
94 Aerostar fuse 5 blows
Looks like I have a dead short on Fuse 5 (5 amp) in the passenger cab on the drivers side.
The emergency flashers work, but the blinkers do not.
I have a good meter and also made up a jumper to measure the current being drawn and it is well over 12 amps. Which I measure for just an instant.
Any ideas on what is wrong?
Thank you
The emergency flashers work, but the blinkers do not.
I have a good meter and also made up a jumper to measure the current being drawn and it is well over 12 amps. Which I measure for just an instant.
Any ideas on what is wrong?
Thank you
#4
Pretty sure the hazards use a different flasher than the signal lamps.
If all the lamps work fine with the hazard system , that would rule out the supply to the flasher and all the lamps.
The only difference would be within the signal lite flasher, or switch , the rest works fine is of no concern.
Just looking without any diagram what IS concerning is it has to be supplying a pretty small load to utilize a 5 amp fuse. Should that possibly be a 15 amp fuse in there ?
If all the lamps work fine with the hazard system , that would rule out the supply to the flasher and all the lamps.
The only difference would be within the signal lite flasher, or switch , the rest works fine is of no concern.
Just looking without any diagram what IS concerning is it has to be supplying a pretty small load to utilize a 5 amp fuse. Should that possibly be a 15 amp fuse in there ?
#5
94 Aerostar fuse 5 blows
Pretty sure the hazards use a different flasher than the signal lamps.
If all the lamps work fine with the hazard system , that would rule out the supply to the flasher and all the lamps.
The only difference would be within the signal lite flasher, or switch , the rest works fine is of no concern.
Just looking without any diagram what IS concerning is it has to be supplying a pretty small load to utilize a 5 amp fuse. Should that possibly be a 15 amp fuse in there ?
If all the lamps work fine with the hazard system , that would rule out the supply to the flasher and all the lamps.
The only difference would be within the signal lite flasher, or switch , the rest works fine is of no concern.
Just looking without any diagram what IS concerning is it has to be supplying a pretty small load to utilize a 5 amp fuse. Should that possibly be a 15 amp fuse in there ?
This version uses only one Flasher for both the blinkers and Hazard. I had replaced the Multi Switch and everything ran OK.
I will check Lamps and unplug the Switch to see if I can isolate the problem.
Thank you, Jack
#8
You will need a wiring diagram and ohm meter. You probably have a short to ground and that can be verified at the fuse connection and start disconnecting to see the very low resistive path to ground disappear, giving you some direction. My bet is a chaffed or pinched wire, especially if any work had been done in the past.. Disconnect the battery prior to doing any resistive checks.
Last edited by raski; 07-03-2022 at 08:05 AM.
#9
94 Aerostar fuse 5 blows
You will need a wiring diagram and ohm meter. You probably have a short to ground and that can be verified at the fuse connection and start disconnecting to see the very low resistive path to ground disappear, giving you some direction. My bet is a chaffed or pinched wire, especially if any work had been done in the past.. Disconnect the battery prior to doing any resistive checks.
I will disconnect the battery and do the resistance tests as I try to isolate things on that fuse.
Thank you
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