idiot lights

[tevogel]

i have a 1991 fj80.sometimes when i start it up there are 3 idiot lights that stay on ,at oil temp,brake light and square light above voltage gauge.sometimes they stay on for quite a while and sometimes will go off in 15 mins.also when those lights are on the cruise control will not work.alternator and battery are fine.im thinking maybe a relay or sensor sticking.any ideas?thanks terry

 

[CJF]

alternator and battery are fine.

You sure? That's the standard alternator warning. You had it tested, and/or are monitoting your voltage with more than just the dash gauge?

Curtis

 

[tevogel]

hi

no,have not had it tested yet.but i have driven it for quite a while with lights on and they never dim.will a alternator go slowly or die all of a sudden?does anyone have a idea how much a new one from cdan runs?in case i need it

 

[Spydaz]

How many miles are on the rig what kind of service have you done or the PO doen to the truck etc... Could be sensors, just trying to get a background

 

[tevogel]

hi

its got 193000 miles.previous owner took care of it but i dont have service records.if its a relay where is it located?

 

[Beowulf]

no,have not had it tested yet.but i have driven it for quite a while with lights on and they never dim.will a alternator go slowly or die all of a sudden?does anyone have a idea how much a new one from cdan runs?in case i need it

Might need a set of alternator brushes. They are cheap from C-Dan and relatively easy to replace on the 1FZ-FE; not sure on the 3FE.

-B-

 

[-Spike-]

I know you'd like it to be a relay, but I don't believe one exists. Most likely your alternator is going.

-Spike

 

[Spydaz]

Alt is probably bad but i am concerned with the AT oil light and the brake light. So your saying that the AT oil light goes on when the truck is cold before you start it? And they go off after a while when truck is at op temperature?

 

[tevogel]

hi

probably right.just my luck!anyboby know what a new one from cdan costs since i cant call him on sunday?

 

[FrankTorres]

3 idiot lights that stay on ,at oil temp,brake light and square light above voltage gauge

Yes, those are standard inop alt. warning lights, for your FJ.
Replacement brushes are not feasible for that alternator.

Do not use a cheap replacement alternator. Go with a high quality OEM.
I went through 3 alternators in 3 years till I figured it out $$.

good luck

 

[tevogel]

hi

either all 3 lights are on together after i start it or none at all.at oil temp.parking brake and square light above voltage gauge.i tend to think its the alternator going.it only started doing it after the battery went bad and i replaced it!!!!!!!!

 

[tevogel]

hi

just tested alternator,showing 14.1volts with no lights on

 

[MTBMAN18]

Mine did the same thing fro about a week before the alternator died about 4 hours from home one trip to Uhwarrie(I believe that wonderfull red mud is what killed off in the end). I went with a mean green and never had any other issues.

 

[FrankTorres]

maybe the belts are loose?

 

[tevogel]

hi

good point frank

 

[hvymtlfan]

3 idiot lights that stay on ,at oil temp,brake light and square light above voltage g

Dito on light sequence, mine just started to come on, then flash off/on based on road conditions. Now, burning all time, so assume I may be in same boat: Simply adjust belt, and I'll do tonight.

Any other ideas, that this is a std. FJ80 alt. sequence, loose wire, but any other? ?.

Just started after I had someone test drive. Looks like I sold it,
not to excited till I see the $$, yet assume maybe they just put to floor (for what a 4.0 is worth) and belt's began to slip.
Can't beleive the alt JUST decided to fail. Makes me ????

Any who, just curious on any ideas??

Thanks, in adv.