4x4 Action Group

Would appreciate thoughts on causes

Events preceeding
Wash engine with high pressure water gun.
Next day, trip from Centrurion to Potch, ok
At Potch (5 hours after stop), no start
5A fuse melts when turning the key
(Immobiliser, fuse box under steering)
Get help from LR tech (gr8 guy)
Even blows a 30A fuse.
He decides to short circuit the fuse (I crynch)
Car starts, all good
Back home, I replace all fuses with spec
None burns, problem disappeared,
Except central locking on back doors dont work
And weak on the front doors
I have job pressures and decided to worry abou that another weenend

Then
About 4 weeks later, I stop at my house
As I get out, I smell burning plastic
The neighbours are building and I wonder what they are doing
Pick up something in the house and get back the car
See smoke coming from the dash and hear that aweful crackling burning sound
Rush, disconnect the battery

Some checking
No fuse were blown
No ECU error codes
Instrumentation seemed ok
No start. Just cramck and then shut down

What happened?
Where to get a replacement board?

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I lost a VR6 with similar story.
Eventually CSIR investigation revealed water corrosion in ac control unit, caused the short circuit and fire.
Sounds like you were lucky


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101 ...

Dont steam clean or HP hose modern engines
as compromise sensors etc etc etc ...
... Crank Angle Sensor in my case ...

Hand wash / Sponge engine !

Steam and high pressure hose are FAR more permeating than wading deep water etc !

I know most will disagree here ...

I pressure wash all my engines. Never had a problem. Maybe it is vehicle related. Electrical connectors are not equal.

Also force of habit. I always make sure that all things that can get water ingress, is placed so that water can run out, post haste. Not to collect in any cavity.