Alternator failing to produce power until revs rise

[Heathydee]

The parts arrived today and were installed . The warning lights extinguish and the alternator produces power at startup . There are 3.75 volts in wire "L" with the ignition on before the motor is started . The resisitor became warm to the the touch after a minute or two . I left it outside the wiring harness for better cooling . After startup there is 28v or so in wire "L" .
Thanks for the help people !

Heath

 

[pc1966]

The resisitor became warm to the the touch after a minute or two . I left it outside the wiring harness for better cooling .

If it is one of the aluminium types it should be screwed to a metal plate - any of the car bodywork will do (but grease any holes to minimise rust, not that landies are ever free from rust anyway...)

Otherwise it may get rather hot if ignition on and engine not running!

In fact any resistor doing that job will get hot, but the metal ones are easier to deal with and maintain below insulator-melting temperatures by fixing them to the chassis.

 

[Heathydee]

Thanks guys. All fixed with a fortnight's testing completed . The resister and diode were wired in externally with a heat sink attached . The ignition lights extinguish immediately on startup .
Good result