GarethHowell
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Further to previous posts on the topic of my dead Dometic fridge; having found a wiring diagram for the 'van I have been able to (maybe) isolate the source of the problem. Unfortunately, it's so strange I need somebody to check my thinking. Here goes.
The Sargent has two 12V wires that go to the fridge:
Feed 1 - the switched 12V - is fine at the fridge end.
Feed 2 - the permanent 12V - is only 2V at the fridge end. I've tested the voltage to the chassis and to the two White/Red 0V wires on the connector. I've also tested with the connector made and unmade.
This implies the problem is a fault with the wire. I've never seen something like this before unless the wire is exposed to chaffing. In this case, the wire is in an insulated pair with the other feed. This in turn is in a big loom that runs in a conduit. Also, the fault appeared overnight after we had been on-site for a couple of days.
The next step is to feed 12V from another source to (hopefully) exclude the fridge itself as the problem.
Assuming the fridge is OK, then the dodgy wire has to be the problem. Or am I missing something?
The Sargent has two 12V wires that go to the fridge:
- Thick Red/Yellow from P17. 12V feed to the cooling element - only active when the engine is running.
- Thin Brown/Purple from P7. Permanent 12V for the internal light and controls.
Feed 1 - the switched 12V - is fine at the fridge end.
Feed 2 - the permanent 12V - is only 2V at the fridge end. I've tested the voltage to the chassis and to the two White/Red 0V wires on the connector. I've also tested with the connector made and unmade.
This implies the problem is a fault with the wire. I've never seen something like this before unless the wire is exposed to chaffing. In this case, the wire is in an insulated pair with the other feed. This in turn is in a big loom that runs in a conduit. Also, the fault appeared overnight after we had been on-site for a couple of days.
The next step is to feed 12V from another source to (hopefully) exclude the fridge itself as the problem.
Assuming the fridge is OK, then the dodgy wire has to be the problem. Or am I missing something?