Andycpped

New Member
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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