main fuse blows

[andrewward]

hi i have an isuzu mu '91 japanese import ucs55dw7103881 on starting
the main fuse blows i replace the fuse and it blows again ,i leave the car
for the next morning replace the fuse again and the engine starts no problem ,after a month o so the main fuse blows again I do the same thing again and the engine starts,after a week the same problem again
i took the car to an auto electrician and could not find where the problem was changed the fuse again and the engine starts ,next morning the fuse blows again i took it again to another electrician same thing ,this is driving me mad it seems that we cannot isolate the problem ,can you help us out
here,many thanks

[pig75]

I had the same problem.
Check the wires that run along the sump on the passenger side for wear where the clamps are. It’s very hard to spot

[andrewward]

thanks pig75 my isuzu is a 2.8 turbo diesel right hand drive ,don't know much about wiring and stuff but I will have a look at the sump,was your problem the same as mine , how did you find the cause of the problem
do you have a diagram I could follow ,I appreciate your help here,thanks

[geeves]

I had a similar problem on my work corolla Over 6 weeks it went to the mechanic 5 times on a tow truck and each time the problem was gone when it got there. Very frustrating even when your not paying the bill. Turned out to be a wire that runs under the back seat to the fuel pump in the tank had worn through. As this corolla has been converted to a van getting to it meant taking out the load floor and cargo barrier.
Hope your isnt as hard as this

[pig75]

Nov 14, 2008 10:20:07 GMT 11 andrewward said:

thanks pig75 my isuzu is a 2.8 turbo diesel right hand drive ,don't know much about wiring and stuff but I will have a look at the sump,was your problem the same as mine , how did you find the cause of the problem
do you have a diagram I could follow ,I appreciate your help here,thanks

same as yours it took about 6 hours to find it
the red circles show the clamps that rub through

[andrewward]

great, that realy helps a lot , I have arranged for a tow truck this morning
and back to the garage I will have a look at the samp first thing ,I have checked all other components but it seems there is nothing wrong there
the alternator is fine and the ignition is fine,so I have to ckeck all the odd wireing now,hope I will fined the fault,thanks again

[geeves]

One thing always go back to the same sparky unless you have a good reason not to. They already know what theve tryed so wont try it again. Might be worth buying a multimeter so you can do some diagnosing yourself on the side of the road next time it dies

[andrewward]

hi Greeves ,my MU has been repaired at last 2weeks ago the problem was with the alternator now is runs fine.thanks again for the hints and stuff
greetings and best wishes