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Am still running on original high -amperage fusible link fuses on the 1999 LS400.
After 20 years am going to replace all...cheap insurance and will retain originals as spares...
In another forum posting, the Author presented plug-and-play alternator upgrade: 100A to 130A Denso alternator.. (from 2001-2003 LS430 only).and I eventually did so on friends 1998 LS400...
Here's the thing....the OEM alternator fuse is rated 120A and the new alternator has the potential for 130A. (It is more efficient due to use of rectangular vs round wire and produces more power under the curve ). .so checked in Toyota's parts bin and was informed a 140A fusible link would plug right in.
Litttelfuse does not offer a 140A compatible fuse, however Bussmann does.
Some explanation and supporting images as to WHY I purchased the 140A fusible link from Lexus dealer at $15 each, instead of acquiring from Bussmann or Littelfuse supply chain partner...
Am not recommending Bussmann or Littelfuse branded fuses.for our cars....
Here's why:
The OEM supplier is Japanese based PEC
https://www.pecj.co.jp/en/fuse/
A profile shot of PEC terminals... not forked like Bussmann or Littelfuse..so while this design necessitates completely removimg the screw, the clamping surface contact area in relationship to the underside head of screw appears double Boldly labeled and, the internal copper conductors within fuse cavity appear to be (tin?) plated, whereas the Bussmann and perhaps Littelfuse are not. This is Littelfuse 120A fusible link...notice the forked terminals...not ideal for full contact with underside of head of clamping fastener. ....and the illustrious Bussmann Raw unplated copper internals...oxidation to come?..
Electrons travel over outside of conductors.
Also no screen printed lettering... amperage rating molded into clear plastic proves very difficult to read...although color coded rating.
Several forum members have remarked that they can't extract the fuse...by pulling as you would with bladed fuses. Now you know why...
I will contact PEC USA to determine their supply chain partners...so members aren't tempted to buy aftermarket Littelfuse or Bussmann. .and report findings.
good info here!
mostly excited about the 130A alternator from a 430 can be used on our cars!
this would be good for guys running high wattage aftermarket sound systems, or air suspension for their compressors.
Any concern about downstream wires, fuses, components being properly engineered for the higher current capacity you've now enabled?
No. This is a main fuse and all other electronic/electrical system components are individually fused.
The main negative ground on LS430 is 6 gauge wire.The main positive cable also appears to be 6 gauge ....
Same as the LS400.
Typically the main ("alternator") fusible link blows when someone shorts to ground the fusible link block, because they failed to disconnect negative ground cable at battery.
The replacement is because a 130A alternator is installed.
So you know, the 1998 LS400 with 130A alternator is working with the 120A fusible link.
Acquired a set of fusible links through Toyota (vs aftermarket Littelfuse or Bussman).
Aftermarket fuses employ forked spade lugs (depicted earlier in this post) vs the OEM lugs which employs solid blades with screw holes.
Removing OEM fusible link fuses from the fusible link block requires removing screws before extracting fuses.
The configuration does not work well with forked fuse lugs...due to small size of clamping screws.
One side of the block employs 8mm diameter head hex bolts with captive split lock washers and the other uses 10mm diameter hex head bolts with captive lockwashers. (??)
Several of the fuses provided by Toyota are not the same as OEM.
Images posted of each.(except 120A)
The fusible link block depicted was located online... it is missing 120A fuse and the poster managed to break the plastic mounting tab where connected to main fusebox.
120A fuse missing. However, not my fuse block.. and poster managed to break mounting tab. The general theme of auto repair is you don't do the repair unless you know what you're doing... OEM fuse on left has tin-plated lugs, however Toyota replacement is unplated copper, which is incorrect... This part was made in the U.S. and not Japan... This parts bag tag does not provide Country of origin. However it does not have tin-plated lugs and appears to be a substitution not made in Japan....
This fuse appears to be correct. Tin-plated lugs and bag tag contains magic words "Made in Japan" Original fusible link does not have tin-plated lugs...which explains the oxidation. A close -up of oxidation.. Unsure why OEM used unplated fuse lugs on 50A fuses, but employed plated tabs on the others.. Second 50A fusible link also displays oxidation.... The replacement bag tag states "made inJapan of imported materials". What a play on words! Highly unlikely parts imported from the U.S. Perhaps China? Original OEM on left. The replacements are missing the white inserts... When paying $10 for a fuse, expect original made in Japan. Fuse block fusible link clamping bolts. The split lockwasher approach seems off. Two different size bolts employed for each side.. Perhaps it prevents assembly line workers from connecting harness wiring to wrong side of buss? Used CRC Electrical Cleaner on fuse block sockets. Worked well.
Replaced the green fuse and am using red 50A replacemebt fuses for now. Will.determine if solid lug tin-plated available Am going to visit with dealer regarding the black and yellow fuses. The 120A was replaced with a 140A on account of 130 A alternator. - discussed earlier.
A buddy sent me a write-up on martial arts gear that while "made in Japan" is indicated it is not "made in Japan" but assembled from foreign components. I'm unable to find the link. The base of the article mentioned the ambiguity in the labeling. So as long as it meets a certain % level of assembly they are allowed to mark them as "Made in Japan". Some labels may indicate other source components so there are variables out there.
A buddy sent me a write-up on martial arts gear that while "made in Japan" is indicated it is not "made in Japan" but assembled from foreign components. I'm unable to find the link. The base of the article mentioned the ambiguity in the labeling. So as long as it meets a certain % level of assembly they are allowed to mark them as "Made in Japan". Some labels may indicate other source components so there are variables out there.
Am reminded that most Lexus owners do not work on their own cars.
The majority does not know enough to be informed consumers.
Probably a real headache for Lexus to endure customer complaining when a vehicle so reliable after 20-30 years use now requires a new starter with "only" 150,000 miles, when most other brands require replacement at half that figure. Had a seven year old 1982 Mercedes SEL380 with 77,000 miles when the starter failed...
It is a global parts economy, so if I am going to pay a premium price for purchasing parts through Toyota North America's supply chain partners parts department (versus ordering overseas), then TNA must remain vigilant to prevent accountants from influencing quality, to insure compromised replacement parts do not enter the parts stream.
12-17-17, 08:45 PM
Best brand of fuse to use
on this swap.
