The Mitsubishi Pajero Owners Club®

rewjon

Recently changed alternator on paj 1995 LWB 2.8 TD auto diesel and now 80amp fuse (fitted In between alternator and battery) keeps blowing but only when I start her

Searched all over for an bad earth but not found it. so just trying to rule things out

do I need a few in any case between alternator and battery?

any suggestions or ideas?

cheers rewjon

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peteinchad · Posted: Fri Feb 15, 2019 14:59 Post subject:

Is it the 80A fuse on the positive battery post?

Mark3 · Posted: Fri Feb 15, 2019 17:04 Post subject:

peteinchad · Posted: Fri Feb 15, 2019 17:16 Post subject:

rewjon · Posted: Fri Feb 15, 2019 20:51 Post subject: hi guys

thanks for replies

helps to know that is the heater fuse

the heater does come on automatically when I disconnect and then reconnect the battery and put the ignition key in
everything works ok - meaning the fuse is ok until I start her, then the fuse blow.

going to keep on checking to see if I have a bad earth somewhere - but i'm baffled - if it's just the heater fuse and the heating works ok when car engine isn't running
so why should it blow as soon as I start her?
Confused

peteinchad · Posted: Sat Feb 16, 2019 4:13 Post subject:

Is it that fuse on the battery terminal that is blowing!

rewjon · Posted: Sat Feb 16, 2019 13:41 Post subject: 80amp fuse blow

yer that's the one

I've done a voltage drop test using load - alternator is ok but battery is not charging

so if the 80amp fuse has nothing to do with the alternator charging the battery, then I need to look elsewhere

only ideas I have so far are to look for a bad earth between alternator and battery (battery is 3 months old - have 3 other spare batteries ready charged and same happens on all ie; no charge from alternator)

I am willing to consider I am overlooking the obvious here, my abilities are patchy - i'm just the sort that gets stuck in and finds out as I go along!

cheers keep 'em coming

peteinchad · Posted: Sat Feb 16, 2019 18:42 Post subject:

That one does the glow plugs - also known as heater plugs - so you have a short on the glow plug circuit if that one is blowing.