Van will Jump but not start after running

[T25Bluealloy]

ok I got the regulator out and here are the pics, I have no idea if the brushes should be longer but Im guess its a whle unit so something else might have gone on it...can I get this from GSF Parts?

also thanks for everyone replying here, Im really starting to know more about my bus than I did before..so

[T25Bluealloy]

Also, have a look at fitting a 'hot start relay' - should only cost a few quid and about 20mins to fit. It basically takes the current to spin the starter straight from the battery rather than routing it through the ignition switch wiring


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I think i have one,but i may be wrong but I took a pic, does this help? :

[bigbadbob76]

Brush length looks acceptable, mine was a lot worse than that when i changed it and was still working fine.
I only changed it as I wanted a 14.5v regulator for split charging and the original was giving me 13.9v.
Is there a voltage stamped on your regulator?

[T25Bluealloy]

Brush length looks acceptable, mine was a lot worse than that when i changed it and was still working fine.
I only changed it as I wanted a 14.5v regulator for split charging and the original was giving me 13.9v.
Is there a voltage stamped on your regulator?

ok i couldnt find it on the part but I put the part number into google and it said that mine was :


Electrical specifications

Voltage 14
Voltage setting 14.7
Physical specifications

E Dist. mount. holes mm 65.00

[bigbadbob76]

Worth changing the regulator then if you're measuring 14.1v.
But that wouldn't stop the battery charging enough to start the van.
Can you borrow a known good battery off something else?

[T25Bluealloy]

Worth changing the regulator then if you're measuring 14.1v.
But that wouldn't stop the battery charging enough to start the van.
Can you borrow a known good battery off something else?

tried new battery still the same, so Im wondering if its the starter motor now...i may have to give it to the garage as now I have the buzzer of doom also coming on after 2000revs...

[colinthefox]

now I have the buzzer of doom also coming on after 2000revs...

In that case have a look at the earth strap between the front of the gearbox and the chassis for corrosion. Try the starter in the dark, and you might see a little firework display. Take the strap off, clean up the ends, clean up where it attaches either end, coat joint faces with copper grease and bolt up again. Worth a try.
Also have a look at the earth strap from the negative terminal of the battery to chassis.

[bigbadbob76]

where is the starter motor please?

Which passat td lump have you got in there?

[T25Bluealloy]

now I have the buzzer of doom also coming on after 2000revs...

In that case have a look at the earth strap between the front of the gearbox and the chassis for corrosion. Try the starter in the dark, and you might see a little firework display. Take the strap off, clean up the ends, clean up where it attaches either end, coat joint faces with copper grease and bolt up again. Worth a try.
Also have a look at the earth strap from the negative terminal of the battery to chassis.

ok I will try this out, thanks alot colinthefox

[T25Bluealloy]

where is the starter motor please?

Which passat td lump have you got in there?

i know however i have now found it the other day ..I got a 1.9 TD 1999 lump, its on its side as it didnt quite fit, bit of an oil leak sadly but very economical..so every pic i use (from the hannes mannual) I have to turn to find things..