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fuse hot to touch

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fuse hot to touch

Post by tuf045 »

I have a hj47 land cruiser and the head light fuse is hot to touch after driving five minutes with the headlights on, any ideas?
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Post by bazooked »

dont touch it :D
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Post by -Scott- »

"Hot to touch" could be 50 degrees. Few aluminium alloys will soften below 450 degrees, so I wouldn't be too concerned.

If you're really worried, pull out the fuse and clean all the contacts.

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Post by toughnut »

Have you changed your bulbs from standard? My fuse for my thermos was doing the same because they were drawing just a bit too much current and melting fuses but not enough to amps to blow the fuse. solution for me was to split the thermo's into two fuses. ;)
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Post by RaginRover »

How big is the fuse and how many headlights and what size are the bulbs ?

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Post by drivesafe »

Hi tuf045, fuses getting warm is common but make sure the wire running to you lights is not getting the slightest bit warm or you will have problems.

Even just the fuse getting hot will cause a slight voltage drop and as such, a light voltage drop will cause your lights to dull ever so slightly.

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hot

Post by tuf045 »

toughnut wrote:Have you changed your bulbs from standard? My fuse for my thermos was doing the same because they were drawing just a bit too much current and melting fuses but not enough to amps to blow the fuse. solution for me was to split the thermo's into two fuses. ;)
yes the i have 90/110s in the semi sealed beams and have been told to add a relay to the headlights as on this model the headlights only have a fuse and no relay, So will try that and see what happens.

thanks for the replies all.
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Post by spannercrab »

Had a HJ45 (close enough :) - fuse would get hot then lights would cut out ... running 90/110's ... problem was / is corrosion on the terminals / fuse itself - causes high resistance connection - which causes heat.

Upgrading to new loom (can get kits for cheap on eBay) is definately a wise choice - as the light switch on these things IS the switch which carries all the current to the lights ... after 30 years of use, the contacts tend to get a bit dirty / warm - also the wiring isn't exactly high capacity.

Fuse fix was just to clean the fuse & holder etc with emery paper / files ... whatever was available.

Upgraded the wiring loom also to 6mm running a pair of relays with external fuses straight to the battery. Fixed up them lighting problems good.
If it's worth doing - it's worth doing to excess ...
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