Author Topic: That 50 amp glow plug fuse  (Read 2850 times)

December 09, 2019, 02:57:30 pm

Spokerider

  • Junior

  • Offline
  • **

  • 195
That 50 amp glow plug fuse
« on: December 09, 2019, 02:57:30 pm »
Just found a break in the 1992 Jetta 1.6TD glow plug fuse. It's that blade version of fuse held into the fuse holder by two phillips screws.

 Why do these break? I don't see an obvious short anywhere on the glow plug buss bar.

 I did have a water leak from bottom of windshield into cabin, that I'm hoping I have fixed. The rubber windshield molding had a small gap where it meets on the middle.....thinking rain was getting in there.
 Is it possible it got into the fuse box? Damaging relay?

 Or.....do these fuses just break all on their own with age / heat / vibes?
 



Reply #1December 09, 2019, 04:03:57 pm

libbydiesel

  • Global Moderator
  • Veteran

  • Offline
  • *****

  • 3416
Re: That 50 amp glow plug fuse
« Reply #1 on: December 09, 2019, 04:03:57 pm »
They break all on their own from age / heat / vibes.  They are super-cheap but often not available at local auto parts stores.  Order a couple extra and put them in the glove box or ashtray.   

Reply #2December 09, 2019, 04:36:53 pm

Spokerider

  • Junior

  • Offline
  • **

  • 195
Re: That 50 amp glow plug fuse
« Reply #2 on: December 09, 2019, 04:36:53 pm »
Thank you Libby,
 The fuse box was bone dry......so all good there.
 Will get a couple of those pesky fuses for now and wire in a better fuse box later.
 

Reply #3December 09, 2019, 05:23:51 pm

ORCoaster

  • Moderator
  • Veteran

  • Offline
  • ***

  • 4384
  • Personal Text
    Restoring a Caddy as time and weather allows
Re: That 50 amp glow plug fuse
« Reply #3 on: December 09, 2019, 05:23:51 pm »
Spokerider,  Do an upgrade on that fuse.  From the autoparts store you get one of those holders with a cap on it. Get one with at least 12 gauge wire.  Then do a remove on the old box and solder and sleeve with shrink tubing on the new one.  That way you can replace the fuse should it pop again with one you can buy anywhere nowadays.  Those thin tin strips were a good cheap working product but we have developed better ones for todays cars.

You might be time ahead going over the fuse box under the dash if you think you had a water leak in there.  Never hurts to pull and clean terminal ends every so often. 

Just my take. 

Reply #4January 01, 2020, 07:11:31 pm

thomas m

  • Junior

  • Offline
  • **

  • 144
Re: That 50 amp glow plug fuse
« Reply #4 on: January 01, 2020, 07:11:31 pm »
The original body caulking on the firewall has a tendency to age and crack, letting water in. Pull the plastic water shield in front of the windshield wiper assembly, inspect and reseal the dried caulking. I use a "syruppy" water proofing called Tectyl 506 by Chevron, I think.
Lay it on all of the seams that you can get at. That area is a water way in the rain.
Thomas, Original owner since new:
1991 MK2 Jetta Non-turbo 1.6 diesel, Engine Code ME, 5 speed 020 AWY 04120 transmission, Hydraulic Lifters,
320,000 miles
Location: Vancouver, WA
LOOKING FOR REBUILD OPTIONS IN PORTLAND, OR OR ON THE WEST COAST

 

Fixmyvw.com