eurodirver

Hi CL,

Whenever I apply my brakes, my lights dim for a second and then quickly go back to normal. It happens every time, no matter what.

I researched it a little and it seems as though I might have a bad ground connection wire.

Anything else anyone can recommend? Its kind of an annoying problem.

Thank you

steve2006

Hi,
If you have a pre October 1994 LS400 check the trunk hinge wiring loom for broken wires,other possibles are a battery on its way out or alternator problems or as you suggest a poor earth/ground connection.

PureDrifter

iTrader: (10)

http://www.lexls.com/tutorials/lighting/bulbout.html

Max Power

I have the same problem. Just a very slight dimming when pressing on the brakes for a split second and then back to normal.

I'll check out the trunk. Thanks for the info, as always!

GillaG

Same issue here for a split second. Mine is a 1998 built in August of '97

PureDrifter

iTrader: (10)

also, check alternator output.

jcp2000

i have that same thing going on. my battery is new alternator output is good i just think is bad grounds or wiring..

another thing for me is if i hit the bakes a little hard the radio cuts out for a second or 2 then goes back on

eurodirver

Hi CL,

Does anyone know where the main ground chassis cable is? Is it directly under the battery holder?

Thank you

Max Power

I had my alternator replaced last summer after a little bit of power steering fluid dripped on it. It seemed fine but I was going on a road trip and didn't want to risk it. So yeah, new alternator.

ntrsssgti8

I am also having this issue in my 91 but it got to the point were a couple of time it actually cut out my my radio, put a new alt in it and it still happens but no were near the extreme that I was gitting prior to the change. My next thought on the matter was to put some kind of an aftermarket ground plate and system in the car to see if that helped stablize the whole thing.

eurodirver

ntr, did your alternator have PS fluid on it or was it just getting old?

GillaG

I know that when I did my timing belt 2 months ago that there was PS fluid on the alternator then. I cleaned it off as best as I could but I am going to have to address the PS leak some time in the future.

ntrsssgti8

ye there is quite a big leak from that system if I put fluid in it is out within a couple days and I have tried the lucas ps fix and that helped quiet my pump but it still leaks and I work for a parts store so if this one kicks then I can just get another pretty quickly. What is a common leaking point for this system as everyone seams to have ps fluid on there alternator

deanshark

Common? Every part to do with the PS is common to leak on these cars. https://www.clublexus.com/forums/ls4...ing-bible.html
Lucas fix isn't going to work on the high pressure hose.
GillaG: cleaning the fluid off the alternator won't do. The fluid gets inside the alt. If it's there already you're gonna need a new one soon. (after you fix the PS leak)

eurodirver

Has anyone tried changing out their alternator yet? I am going to look under the battery to see where the ground cable goes.

Thank you