Blown fuze
Blown fuze
I put new lights on my 420 crawler, but when I turn them on, I blow a fuse. Just by visual inspection I am not seeing any shorts. Any advice on tracing down the solution to the problem?
Re: Blown fuze
disconnect all lights and test each individual light at a time, may find which one causing issue. then try larger fuse if find short and fixed if all lights blow fuse after fixed.
EDIT>>by the way, anytime you move some of these old wires, you can easily get a short, had a loose nut on starter solenoid and simply tightened it up and literarily burnt wiring clear up to alternator, before could disconnect battery.. needless to say i replaced all that!! tho still have some old wiring hanging around the old girl.
EDIT>>by the way, anytime you move some of these old wires, you can easily get a short, had a loose nut on starter solenoid and simply tightened it up and literarily burnt wiring clear up to alternator, before could disconnect battery.. needless to say i replaced all that!! tho still have some old wiring hanging around the old girl.
Last edited by dtoots1 on Sun Jan 26, 2020 8:02 am, edited 1 time in total.
- gregjo1948
- 350 crawler
- Posts: 1000
- Joined: Mon Aug 30, 2010 5:58 am
- Location: Newark Valley,NY,USA
Re: Blown fuze
I've found a short by replacing the fuse with a jumper and looking for the smoke. It can be a bit risky because a fire could start. BE CAREFUL!
JD 350B diesel 6way blade, Case 580B Loader/backhoe, Farmall 504 high crop w/ flail boom mower, International 404 , International 284 diesel w/belly mower, 1972 Ford F600 dump truck, Galion 3-5 roller, Allis Chalmers D17, 1620 Ford
Re: Blown fuze
Thanks for advice. I suspect I probably need to take the dash off and the hood off, and then trace the wires from the switch to the lights. I think I will disconnect the lights and put a test light on them. I do not want to blow a bulb. I do not recall if I replaced all the wiring when I put in the lights or not, but there are plenty of wires running to the front. The old girl is only about 62 years old, so I suppose could easily be bad wiring in there somewhere or I miss wired something. I wonder if it would work if I tested it with just a 1.5 battery instead of using the six volt battery. I know the six volt will blow the fuse. I suppose it could be as simple as some wires touching in the switch that I missed. Kind of a minor pain to go through everything but sounds like no easy (or no easy and safe) way. Thanks much.
Re: Blown fuze
From your description I think your front lights use a bulb like a 1133. You could have a problem in the socket(s) of the old lights. I have seen pigtails short inside lamp sockets. A wire could be pinched or the insulation chafed through somewhere along the way and it can be hard to find. It looks like you have been chasing this since last July. Unless you are wanting to keep original, I would upgrade to seal beams on front, like you have on the rear.
Personally for 25 feet, or less, of wire and a few terminals I would remove the old light wires and put in new. I'd actually rewire the entire crawler. I've tried chasing old brittle wires before and its not worth it on machines with electrical systems as simple as these. JMHO.
Jim
Personally for 25 feet, or less, of wire and a few terminals I would remove the old light wires and put in new. I'd actually rewire the entire crawler. I've tried chasing old brittle wires before and its not worth it on machines with electrical systems as simple as these. JMHO.
Jim
Re: Blown fuze
Jim, Yes I have been chasing it off and on for quite awhile. Just when I think I found the problem, I test it and blow another fuse. Larry
Re: Blown fuze
If you have been fighting it this long, time for a new wiring harness and eliminate the problem.
Lavoy
Lavoy
Parts and restoration for antique and late model John Deere crawlers.
Owner and moderator www.jdcrawlers.com
Owner and moderator www.jdcrawlers.com
Re: Blown fuze
Use a test bulb in place of the fuse. If it is bright you still have the short somewhere. Cheaper than blowing fuses to test. When it gets sorta dim and the other lights light dimly also you are probably working and will not blow the fuse.
No trees were hurt in the creation of this message.
But, many electrons were terribly bothered.
440IC/602, 2-440ICD/831 MM UBU-LP, 445N-LP, 445E-LP, BIG MO 400-M, 4 Star-LP M5-D, M5-LP, M602-LP, M670-LP, G900-LP, G900-D, G1000 Vista-LP Case 580CK
But, many electrons were terribly bothered.
440IC/602, 2-440ICD/831 MM UBU-LP, 445N-LP, 445E-LP, BIG MO 400-M, 4 Star-LP M5-D, M5-LP, M602-LP, M670-LP, G900-LP, G900-D, G1000 Vista-LP Case 580CK
Re: Blown fuze
New wiring harness was one of the best things I've done to it. Used to have a break in the ignition wire, inside the insulation, that I didn't know about for a couple years. It would shut off in the middle of doing something and no amount of cussing was enough to restart it.
Re: Blown fuze
Thanks folks for all the good advice.
Who is online
Users browsing this forum: No registered users and 83 guests