electrical problem?

[hako]

Check all connections to the relay and fuse block under the bonnet....maybe one of the fusible links is loose or corroded. Check all relays to see if they get hot during operation also tap them gently.
14.6V is too high for the alternator - should be 14.2V maximum...maybe the regulator needs replacing or the multimeter you're using is reading wrong?
Try turning the lights on etc and then with the engine running wiggle/wobble/gently pull all wiring basically everywhere till hopefully the fault repeats.
Before all this happened did you do any electrical work on the car?
Last thought - check the ignition switch wiring where it connects behinds the ignition key.

 

[VrWagz1]

Sounds like a high resistance joint somwhere in a main fuse somwhere(coroded or loose fitting). Whats the voltage in the light cct when they dim. Possibly check the a/c voltage as said above as 14.6v does seem high and it still might be a dying reg. It also might be the lug for the main V+ at the back of the alternatot - somtimes the wire burns inside the lug due to poor fitting lug.

 

[jas98]

cheers guys will check all this...might even throw in a new regulator for good measures

 

[VrWagz1]

also have you measured if any ac voltage exists, that will indicate a dead diode too