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turn signal/ backup fuse blowing


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j1mmer5
User

Feb 2, 2008, 2:29 PM

Post #1 of 13 (2301 views)
turn signal/ backup fuse blowing Sign In

1991 Chev half ton p/u 5.0 engine manual trans, 220,000 miles.
The problem I am having is the turn/backup fuse blows when I turn the key on. I had trouble not to long ago where I lost my rear turn signals and brake lights- that problem was a pinched harness between the gas tank bracket and frame- I fixed all that and everything worked fine. So far I have checked the turn signal switch and some wires. I have a plow on this truck and i disconnected the plow lights thinking the problem was there but it wasn't. Right now I have the turn signal switch and the plug on rear of truck disconnected.


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Feb 3, 2008, 3:07 AM

Post #2 of 13 (2295 views)
Re: turn signal/ backup fuse blowing Sign In

You found the harness pinched once back there so get back there - you aren't done yet. Suspect bulb sockets, any trailer wiring that might be there. If disconnecting the rear stuff stops the fuse from blowing you should be about sure the problem is after that plug and anything/anywhere the wires go,

T



j1mmer5
User

Feb 3, 2008, 7:54 AM

Post #3 of 13 (2292 views)
Re: turn signal/ backup fuse blowing Sign In

The rest of that harness is good. With that plug disconnected fuse still blows, as well as having the turn signal switch un plugged it still blows. I even took the turn signal flasher out and it still blows. Could it be on the reverse lights somewhere?
I'm lost!!


Tom Greenleaf
Ultimate Carjunky / Moderator
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Feb 3, 2008, 8:47 AM

Post #4 of 13 (2290 views)
Re: turn signal/ backup fuse blowing Sign In

May need to stock up on fuses to pin down just where the short is. With flasher out I'll guess that the short is in the back up light's hot wire. If a fuse blows without it being in reverse then the problem should be between the switch and the fuse.

Not sure I'm helping much for you. Things like this are the reason hair replacement clinics are so popular!

T



j1mmer5
User

Feb 3, 2008, 10:44 AM

Post #5 of 13 (2287 views)
Re: turn signal/ backup fuse blowing Sign In

Isn't that the truth!

It blows without it in reverse. I'm going out to check the wire between the fuse and switch now so I'll keep you posted.


j1mmer5
User

Feb 3, 2008, 12:14 PM

Post #6 of 13 (2282 views)
Re: turn signal/ backup fuse blowing Sign In

Well!!!!!!

Went looking for backup light switch- thought I found it- unplugged it checked blinkers they worked out of couriousity checked backup lights they were on!!

Plugged whatever it was I uplugged back in turned key fuse held.
Everything works fine right now.

My guess is it is in harness going to backup light switch and me moving it around helped it!!
The harness looks fine its not pinched or rubbing anywhere.

Thanks for now!


j1mmer5
User

Feb 3, 2008, 1:11 PM

Post #7 of 13 (2279 views)
Re: turn signal/ backup fuse blowing Sign In

Mad Well, I put everything back together blinkers and reverse lights worked fine!

Changed oil on the truck, started it checked blinkers worked fine, shut truck off ckecked oil, started truck moved it into driveway checked blinkers nothing pulled fuse its blown!!

Do you now where the backup switch is on manual trans?
I thought I did but appearently not.


way2old
Veteran / Moderator
way2old profile image

Feb 3, 2008, 3:09 PM

Post #8 of 13 (2275 views)
Re: turn signal/ backup fuse blowing Sign In

By any chance is this gonna help ya??





Being way2old is why I need help from younger minds


j1mmer5
User

Feb 3, 2008, 4:36 PM

Post #9 of 13 (2271 views)
Re: turn signal/ backup fuse blowing Sign In

Thats what my manual said to is that its on steering column but I looked and there is nothing there.

This is a 5 speed manual trans.

I'll check there again!


Double J
Veteran / Moderator
Double J profile image

Feb 5, 2008, 2:22 PM

Post #10 of 13 (2260 views)
Re: turn signal/ backup fuse blowing Sign In

How about this.....

Transmission Components


j1mmer5
User

Feb 5, 2008, 4:50 PM

Post #11 of 13 (2255 views)
Re: turn signal/ backup fuse blowing Sign In

I'll check it out and let you know when I get a chance.
Probably won't be till the weekend.
Thanks


j1mmer5
User

Mar 2, 2008, 9:43 AM

Post #12 of 13 (2207 views)
Re: turn signal/ backup fuse blowing Sign In

Cool Hey guys, sorry about the delay in action. Finally got to work on it yesterday. Found a wire rubbed thru on the harness for the backup lights. It was rubbing on seam of the cab.

Thanks for all the help and I really appreciate what you guys are doing here!!
Keep up the great work.


Double J
Veteran / Moderator
Double J profile image

Mar 2, 2008, 2:32 PM

Post #13 of 13 (2203 views)
Re: turn signal/ backup fuse blowing Sign In

Thanks for posting the repair...

Glad you got it fixed...

Jim Cool






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