Gen light stays on

[ardiesse]

Sorry.  Generator.  Take a photo of the left side of the engine, from the exhaust looking forward so I can see the generator.

[Not Happy Jan]

[Not Happy Jan]

Pretty sure it's a Lucas

[ardiesse]

Not what I was expecting - Bosch, originally from an EH.

To see if the generator's in working order,

Take the fan belt off.  Give the generator pulley a spin with your fingers to make sure it turns freely.
Connect the blue "F" wire to ground at the regulator: clamp the fork terminal under one of the regulator mounting screws.
Disconnect the battery positive, leaving negative connected.
Disconnect the brown wire from the generator's D+ terminal.
This is where you need to be a good shot with a jumper lead: connect to the D terminal of the generator, making sure the clamp touches nothing else.
Connect the free end of the jumper lead to the battery (+).

The generator should turn over slowly, in the same direction as the engine drives it: clockwise as seen from the front.

Rob

[Not Happy Jan]

turned a fraction then nothing.

[Not Happy Jan]

Could it be a Lucas regulator and a bosch generator??

[ardiesse]

That's not good.  Does the pulley spin freely?

If you're keen, take the generator and battery out of the car, and repeat the test on the bench.

You'll need a pair of jumper leads and a length of wire.
Connect the DF terminal to the ground terminal (the one where the black wire goes).
Connect the black jumper lead from battery (-) to the frame of the generator, where the adjusting bolt goes.
Connect the red jumper lead to the D+ terminal, and the free end of the red jumper lead to the battery (+).

Generator should spin.

Rob

[ardiesse]

Bosch generator with Lucas regulator will not charge at all.  It's got to do with how the two generators are wired internally.

[Not Happy Jan]

Hey Rob,
It spins out of the car.

[ardiesse]

That's good.  Your generator's basically OK, then.

You need to find a Bosch regulator for an EH.  They look very similar to FC-EK Bosch regulators, but have 25 AMP and RS/UA200/12A49 stamped on one mounting tab, GMH No 7417355 on the other.  I've only got one a.t.m., and I don't want to part with it.

You say you have a Bosch regulator.  Post a photo of its underside, and I'll tell you whether it's for an EH or not.

Rob

[Not Happy Jan]

[Not Happy Jan]

RS/UA160/42/36

[ardiesse]

That's the earlier FC-EK type.

On the underside view, there are three resistors (the little cylinders).  In an EH regulator, the one at the top, left of centre is a rectangle shape, about 30 mm x 25 mm.  That's the easiest way to identify an EH regulator.

Put the call out over the forum, and see whether somebody's got one they're willing to part with.

Rob

[Not Happy Jan]

This one?
So my issue is a incompatible regulator and genny
They worked together for years??

[ardiesse]

That's the one.

I wouldn't say incompatible regulator and generator so much as your replacement regulator decided to give trouble . . .

Be aware that the Echlin regulator has a different terminal layout from the Bosch one.  If your wiring harness is original, it'll "remember" the Bosch connections.

Brown wire to D+, blue wire to DF (in the middle), red wire to B+.

Rob

[Not Happy Jan]

Thanks Heaps Rob.