Charging Circuit Help....Please

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Andycpped

New Member
Posts
15
The issues with my new Range rover continues......

1995 p38 4.0 Std Model

Other day on motorway 70ish, tacho and speedo dropped to 0, then recovered, when I switched the engine off, got "Gearbox fault" displayed.
Did a search on here and the usual suspects are plug under expansion tank and/or voltage drop.

Over the weekend I have cleaned the plug under the expansion tank and all earth and power connections, and made a new earth from batt terminal to body and an onto engine block.

However checking my charging circuit, i have

Battery car not started = 12.6v
Battery car idling = 13.7v
Battery car idling with lights on full beam heater on full, and stereo on 12.2v

(Alternator test done from Alternator positive terminal to alternator body)

Alternator with engine idling = 12.6v
Alternator engine idling with lights on full beam heater on full, and stereo on 12.2v

No more issues with the "gearbox Fault"

It has a new battery, and I'm 95% convinced its the alternator, either coils broke down, or VR (I understand the VR is internal to the Rangey alternatirs, is that correct?)

Am I correct?
Any more thoughts / tests to carry out?

The serial number plate has dis-integrated, so doing more of a search I find that I probably need the 100A rated alternator as the 120A is for the Air Con version, is it worth fitting the 120A especially with the electronics being a bit "susceptible" on the P38?

Cheers....
 
alternator isn't working correctly 13.5 to 14.7volts if charging correctly
 
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