Charging problem and A/T oil temp light

[3XLC]

Hi,

Have a 1992 FJ80. At cold start-up all is well. After about 5 minutes running, I get red light on alternator and red light on "A/T oil temp". Panel voltmeter reads on middle mark, and a DVM gives about 11.95 volts across batt with engine running. Clearly, alternator is not charging. Is the A/T overtemp light normal in this condition or does it suggest something else? Before start, the batt has been charged using a good auto charger and reads 12.6 before start. The trans after 5 minutes is slightly warm; don't believe that it is overtemp at all. Charging lamp relay tests good. I did spraywash the engine about 2 weeks before this started. TIA for any comments.

 

[CJF]

You're seeing the normal lights for a charging issue; I guess Toyota just wanted to make sure folks really didn't miss it, or something...

Pull the alt. and get it tested; highly likely that's the problem.

Curtis

 

[Beowulf]

I did spraywash the engine about 2 weeks before this started. TIA for any comments.

I agree with Curtis that you have a charging problem.

Check the connections on the back of the alternator. You might have got some water in there when you sprayed the engine and now have a corrosion problem. Clean up the connections the best you can.

The brushes in the alternator are cheap and easy to replace once the alternator is removed.

On my DD, I suspected a bad alternator, removed it and had it tested at an AutoZone. Failed. Replaced the brushes and took it to another AZ for testing. It tested bad again but I was OK with that because it was worth a shot and having 2 different places test it made me feel better about buying a reman. Spendy little devil.

-B-

 

[Tapage]

does anyone have the toyota part # for alt brushes . .?

 

[TrickyT]

A '92 is a 3FE truck and the alternator is different. Sorry, but not so easy or inexpensive to replace the brushes on one of these. 1993 and up have the $12 brushes that are quick to replace.

 

[Beowulf]

A '92 is a 3FE truck and the alternator is different. Sorry, but not so easy or inexpensive to replace the brushes on one of these. 1993 and up have the $12 brushes that are quick to replace.

I should know better than to try and answer FJ80 questions. Maybe we need to make a new section.



j/k 3fe guys... j/k


-B-

 

[alkarich]

Same circuit

I had the same thing happen with my FJ62. The tran oil temp and the discharge light both came on when my alt went bad. Fix the charging problem and the AT temp light should go off.

 

[WoodyFJ80]

I am in the process of replacing right now. Call Cdan and get OME part replacment. My alt tested and failed at AZ. Turns out my alt is a after market and not OME and ordered the wrong amp alt. Dan was great and waiting for the new one.

Post up your finds, and I ll do the same in my thread"warning lights"
WoodFJ80 (John)

 

[3XLC]

Thanks

Appreciate all the comments. New alternator on the way.

 

[jonheld]

IIRC a charging issue should light the charge, A/T temp, and brake lights for that full holiday light effect. It gets your attention.

Most likely alternator, but check battery and connections as well.