Dash indicators “Charge --Brakes—Lights” remaining on.

[Sturdavj]

The car had been sitting for three days, I started it up & drove it ~ 200 ft, hit a couple of rough spots on a gravel road, they lit up like a slot machine... and stay lit " whished I was"

I un-hooked the “B”-wire from the alternator and measured 14.9 VDC at 2,000 rpm.

The alternator appears to be charging strong, is this an indication it’s about to fail or is there something /somewhere I should be checking?

The battery is sitting at 12.7 VDC

Hate like hell to get stuck somewhere

[white90dx]

Those lights mean that the regulator thinks that something is wrong.

How is the voltage at the battery when the motor is running at ~2k rpm (with all the wires hooked up)?

Reseat the alternator plug too.

Conceivably the the small fusible link (hidden in the harness, I think...) could be busted. Check for 12+V at the small white wire at the alternator to check that fusible link.

In fact, all the wires at that connect to the alternator (3 small on the plug, 1 big on the stud/nut) should be at 12+V when the car is running...

-Charlie

[Sturdavj]

What is the best way to test for VDC at the alt plug ? (3-wire)

Can it be probed from the backside while still conected?

[white90dx]

Originally Posted by Sturdavj

What is the best way to test for VDC at the alt plug ? (3-wire)

Can it be probed from the backside while still conected?

It is probably a sealed connector. You would have to use a sharp probe through the wire insulation, I think.

-Charlie

[Sturdavj]

There is 12VDC on the male side (wire) of the plug, 0 VDC on the female side (Alt socket) . It appears that I am not getting any output now.. from the “B” no change with the RPM

I pulled the Alt, I plan to have it bench tested this afternoon, The brushes have about ½” remaining and the commentator looks good, I am thinking it might be the Reg.

I have located a salvaged one for $30.00 w/core EX

I am thinking I'll go this way after bench test

[Sturdavj]

Replaced defective alternator with one from salvage yard, lights are now out

[84Cressida]

Almost always when all the lights on the dash are on, it's the alternator. That's an easy way to figure it out on older Toyotas.

[Sturdavj]

What threw me was when I first tested w/multi-meter the alternator was producing ~ 14 VDC.

I had done an AT R&R earlier and thought I might have loose Elec. connections. After TS the wiring I came back to the Alt & sure enough I had a hard fail at the Alt. Bench tested it and no VDC output. R&R w/salvaged unit, everything is fine

Thanks for your input J