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Land Rover Repair/Electrical/air suspention problem


P38 2001 4ltr  My battery started draining very quickly and at the same time one of the relays in the engine compartment fuse box was getting very hot. On closer inspection the fuse box was melting just beside that relay.Purchased two second hand fuse boxes to find they had the same melted points beside  the same relay point. So I thought not much point in fitting those and bought a new one. I should say the relay was the one for the air suspension.Once fitted I checked the alternator to find it was only putting out 10.5 amps.when the a/s relay was removed it went up to 13.1 amps.Tried new alternator-same thing. Going by the other fuse boxes it seems like a common problem, but what is my problem? many thanks

Fuse box meltdown is very common

You should unplug the suspension compressor and see if the hot relay resolves.  If so, you may have a bad compressor.

If the alternator output reading you cite is accurate, the alternator is bad or there is a wiring problem.  

To test the alternator put a clamp on probe on the heavy output wire from the rear of the alternator and put on lights, high fan, defogger, etc.  Rev engine and see what output you show.  Also check voltage.  Alternator should hold over 14v at near rated output, which is 80+ amps depending on year

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John Elder Robison


I own J E Robison Service in Springfield, MA. We are Bosch Car Service for Land Rover, BMW, Mercedes, and other European lines. I can answer most questions about Land Rover service or repair. I'm known as a car enthusiast, machine aficianado, photographer, writer, and speaker. I've been around Land Rovers and British cars most of my life. Visit me at my car business, or my author website, Check out my autism and writing blog at or my photos on John Elder Robison


I have been a Land Rover service manager since Land Rover returned to North America in 1987. My company is a four-star Bosch Car Service facility, known nationwide for Land Rover service, overhaul, customization, and restoration. In addition to Land Rover our company services BMW, Jaguar, Mercedes-Benz, Rolls_Royce, and Bentley motorcars. We have factory-plus-level service capability for all makes. Visit my company online at > service > land rover Also visit my blog at


In the Land Rover world, my writing can be found in various print magazines and online at robisonservice.blogspot,com. In the wider publishing world, my work is published by 20 publishers in over 50 countries. Mt books Look Me in the Eye, Be Different and Raising Cubby have made US and international bestseller lists.

I am ASE certified, Bosch Trained, and trained by Omnitec/T4 and Autologic on their Land Rover test systems.

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