95' 4runner electrical problems, please help!
 

Hello,

I have a 95 4runner with seemingly unique problems. Whenever I step on the brake, use turn signals, hazards, use power anything, it causes the whole system to short and the radio to pop, lights dim, ect. Also when i would turn the car off and leave it in ACC, I would loose all power for a few seconds, up to a few minutes. This also happened after the car had been parked a few times. Checked the fuses, all in good shape. Next checked the terminals, the negative broke as soon as I took it off so I replaced it with a new beefy one and the problem disappeared. All was well until a week ago when the problem came back. My mind instantly thought of the alternator, it makes perfect sense, however I don't want to spend the money on a new one if it isnt the problem.

I'm hoping you guys will have perhaps had this issue before and know what the solution is, thanks in advance! :safari:

Simple to test the alternator on the vehicle with the engine running test the battery voltage.

Then put all the electrical load you would use in a normal drive.

At any time it should not drop below 12.5 VDC ideal would be in the 13VDC to 14VDC but age plays a factor at times.

I take a wire brush to all my ground wires and to where they connect to. Sounds like you have some corrosion that can keep from getting a good connection as well.

Do you have a trailer harness? Try removing all that stuff if you do. Toyota uses a floating ground to power the lighting, well everything matter fact. Ive seen those trailer harness screw things up.