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After 17 years all of the mini-blade fuses in the 1999 LS400 were in inspected and replaced.
Attached are images of the whole lot after extraction and a close-up showing age-related tarnish build-up.
The 10A fuse (red) appears to have more heat-related discoloration...perhaps as a result of increased resistance from tarnish build-up?
In any event, I elected to clean the fuse sockets with electical contact cleaner and replace all tarnished fuses.
For those interested, simply go through your owners manual for count of fuse amperages and order necessary quantities from Digi-key(recommended as a supplier for capacitors on this site) much more
affordably than the auto parts store.
I recently had to replace some of my underdash fuses. a dime fell into the cigarette lighter socket, shorted and too half the dashboard with it! I was totally freaking out when it happened cause I didn't know what was going on. ended up taking out SIX fuses! I replaced ten just to be on the safe side.
I recently had to replace some of my underdash fuses. a dime fell into the cigarette lighter socket, shorted and too half the dashboard with it! I was totally freaking out when it happened cause I didn't know what was going on. ended up taking out SIX fuses! I replaced ten just to be on the safe side.
My goodness!... I'm happy it wasn't worse than that.
After 17 years all of the mini-blade fuses in the 1999 LS400 were in inspected and replaced.
Attached are images of the whole lot after extraction and a close-up showing age-related tarnish build-up.
The 10A fuse (red) appears to have more heat-related discoloration...perhaps as a result of increased resistance from tarnish build-up?
In any event, I elected to clean the fuse sockets with electical contact cleaner and replace all tarnished fuses.
For those interested, simply go through your owners manual for count of fuse amperages and order necessary quantities from Digi-key(recommended as a supplier for capacitors on this site) much more
affordably than the auto parts store.
Try; LITTELFUSE.COM and click products, then fuses
Fuse blades and fuse sockets become tarnished with age.
There have been reports of fuse failures that are not discernible through visual inspection alone...
Inexpensive to replace minor fuses by purchasing through Digi-key...auto parts stores many X the cost.
Simply take a count of number required (engine bay and interior kick panel) by Amp rating...color coded.
I think earlier LS400 (1990-1994?) used larger style bladed fuses and 1995-2000 minis. Verify.
Even though your LS400 appears new, consider it is a 20+ year old automobile.(not a car...)
Can't think of one American made car I owned where the wiring lasted even 10 years....
Contact areas probably require cleaning with contact cleaner that will not dissolve the plastics..
Be mindful.that when separating engine compartment connectors the plastic housings may be brittle and crack....especially on 1995-2000 LS400...earlier models used rubber sheaths, which isolated plastics from engine heat.
Fuse blades and fuse sockets become tarnished with age.
There have been reports of fuse failures that are not discernible through visual inspection alone...
Inexpensive to replace minor fuses by purchasing through Digi-key...auto parts stores many X the cost.
Simply take a count of number required (engine bay and interior kick panel) by Amp rating...color coded.
I think earlier LS400 (1990-1994?) used larger style bladed fuses and 1995-2000 minis. Verify.
Even though your LS400 appears new, consider it is a 20+ year old automobile.(not a car...)
Can't think of one American made car I owned where the wiring lasted even 10 years....
Contact areas probably require cleaning with contact cleaner that will not dissolve the plastics..
Be mindful.that when separating engine compartment connectors the plastic housings may be brittle and crack....especially on 1995-2000 LS400...earlier models used rubber sheaths, which isolated plastics from engine heat.
Have replacement connector shells at the ready..
This looks like a good product...gonna go pick some up and do some cleaning.
Fuse blades and fuse sockets become tarnished with age.
There have been reports of fuse failures that are not discernible through visual inspection alone...
Inexpensive to replace minor fuses by purchasing through Digi-key...auto parts stores many X the cost.
Simply take a count of number required (engine bay and interior kick panel) by Amp rating...color coded.
I think earlier LS400 (1990-1994?) used larger style bladed fuses and 1995-2000 minis. Verify.
Even though your LS400 appears new, consider it is a 20+ year old automobile.(not a car...)
Can't think of one American made car I owned where the wiring lasted even 10 years....
Contact areas probably require cleaning with contact cleaner that will not dissolve the plastics..
Be mindful.that when separating engine compartment connectors the plastic housings may be brittle and crack....especially on 1995-2000 LS400...earlier models used rubber sheaths, which isolated plastics from engine heat.
Toyota used quality relays in LS400 that rarely fail.
It would be expensive to replace all with new OEM.
An alternative is to have a set of spares from a donor vehicle.
Yes, almost unheard of for a relay failure on these. Which for cars in general is a different story.
One other thing you could do, as Yoda has some threads about, is to tune up the sealing of the compartments the relays are in. Often (again, from other cars) when relays fail it is due to corrosion, which can be avoided by sealing the relays' fuse box (or whatever it is in) with good o-rings, etc.
I recently had to replace some of my underdash fuses. a dime fell into the cigarette lighter socket, shorted and too half the dashboard with it! I was totally freaking out when it happened cause I didn't know what was going on. ended up taking out SIX fuses! I replaced ten just to be on the safe side.
I had a quarter fall in mine by chance where all the blown fuses under the driver side?
Yes, almost unheard of for a relay failure on these. Which for cars in general is a different story.
One other thing you could do, as Yoda has some threads about, is to tune up the sealing of the compartments the relays are in. Often (again, from other cars) when relays fail it is due to corrosion, which can be avoided by sealing the relays' fuse box (or whatever it is in) with good o-rings, etc.
Good advice there and i will take it. Gonna order some of that bung-o x seal for my fuse box too. Thanks for the input guys.👍🏽
01-06-16, 09:08 PM
Ls400 fuses
I was totally freaking out when it happened cause I didn't know what was going on. ended up taking out SIX fuses! I replaced ten just to be on the safe side.
