# 9 Fuse blowing 1990 740 gl

debbilee56 · Sep 21st, 2013, 17:27

I have a 1990 740 GL that the #9 fuse keeps blowing. This fuse if for my power windows, turn signals, and A/C. I believe there may be a short somewhere but not sure.

Whether I use my blinker, windows or A/C the fuse blows. Also if I put a new fuse in and don't use any of these items it will blow too. You can tell when it blows. It's almost like something else turns on and it blows the fuse.

Need help to figure this out. Cannot drive my car without any of these items working, especially my windows and blinkers since I live in Texas.

Please help.

vjck_uk · Sep 21st, 2013, 22:07

well from what you have written it looks like the fault is on the flashers circuit so take a closer look at that first try and see if one side is dimmer if so that's the side probably giving trouble
you could put a meter across the fuse terminals and watch the amps when you operate various things

KBB · Sep 22nd, 2013, 08:56

Do not put you DVM in the amps mode across the fuse, if the short is present it will take out the fuse in the meter. Place a bulb across the fuse pins, this will act as the electrical load before the short.

With the bulb in place ignition on flex the harness of the various circuits that are on that fuse, when the bulb is on the short is active when the bulb is out it is in-active.

vjck_uk · Sep 22nd, 2013, 22:21

it depends if you have a decent meter and not a toy lol but a bulb would do the trick as well

Sep 21st, 2013, 17:27	#1
debbilee56 New Member Last Online: Sep 21st, 2013 17:29 Join Date: Sep 2013 Location: blue ridge	# 9 Fuse blowing 1990 740 gl I have a 1990 740 GL that the #9 fuse keeps blowing. This fuse if for my power windows, turn signals, and A/C. I believe there may be a short somewhere but not sure. Whether I use my blinker, windows or A/C the fuse blows. Also if I put a new fuse in and don't use any of these items it will blow too. You can tell when it blows. It's almost like something else turns on and it blows the fuse. Need help to figure this out. Cannot drive my car without any of these items working, especially my windows and blinkers since I live in Texas. Please help.

Sep 21st, 2013, 22:07	#2
vjck_uk Premier member Last Online: Jul 29th, 2017 15:54 Join Date: Nov 2002 Location: southern edge of birmingham	well from what you have written it looks like the fault is on the flashers circuit so take a closer look at that first try and see if one side is dimmer if so that's the side probably giving trouble you could put a meter across the fuse terminals and watch the amps when you operate various things __________________ If all else fails........read the instructions !

Sep 22nd, 2013, 22:21	#4
vjck_uk Premier member Last Online: Jul 29th, 2017 15:54 Join Date: Nov 2002 Location: southern edge of birmingham	it depends if you have a decent meter and not a toy lol but a bulb would do the trick as well __________________ If all else fails........read the instructions ! Last edited by vjck_uk; Sep 22nd, 2013 at 22:31.

Sep 22nd, 2013, 08:56	#3
KBB Master Tech Last Online: May 18th, 2020 10:57 Join Date: Dec 2006 Location: On Contract Dubai Automotve Technical Academy	Do not put you DVM in the amps mode across the fuse, if the short is present it will take out the fuse in the meter. Place a bulb across the fuse pins, this will act as the electrical load before the short. With the bulb in place ignition on flex the harness of the various circuits that are on that fuse, when the bulb is on the short is active when the bulb is out it is in-active.

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