Battery light 166 JTD

[charlee 314]

A friend has a problem on a 2002 166 2.4 JTD (150hp). When he presses the accelerator, the battery warning light turns on around at 1800rpm, then goes out on higher revs. It's off on idle.

This is really strange. Has anyone had any similar experience?

[Paso 239]

Probabaly diodes on the alternatnor are failing or yet another grounding problem.

[charlee 314]

He told me that it's now on all the time and that the alternator is not charging at all. Seems like the diodes.

[Paso 239]

Got the same problem on my 156, it's a 150 EUR job to fix it as it's not easy to remove the alternator. I guess on 166 it's very similar.

[charlee 314]

Apparently you only have to remove the driveshaft to get to the alternator. 166 should have more room in front than a 156

[GTV-TB 315]

Maybe it's just the brushes on the voltage regulator which are worn down, should be replaceable without removing the alternator (on a V6 you may need to temporary remove the oil filter).

 

[charlee 314]

Unfortunately not. Bearing, collector (if that's the correct name) and regulator. Changed everything, works great. 

I didn't know 166s had Marelli alternators

[GTV-TB 315]

The voltage regulator in the picture is for an Bosch alternator,  some 166 at least TS have Marelli alternators.

[charlee 314]

This one is a 2.4 JTD 150hp. The last 10V