Just installed a new camper side plug because the old one was damaged. Connecting everything right, camper was drawing power from the truck yesterday when I left home. Last night and today, no dice. The driving lights all work, so the plug’s not the problem. A voltmeter tells me that the wire in the camper is getting 14.6 volts when the truck is running. Looking around for any fuses or breakers that might be bad, but all is good. So…what the heck is going on here?! Anyone experience this before? Any suggestions for what to try?

OK on alternator but not battery suggests bad battery or connection. Load test the battery and test the voltage from the battery posts - (not the cable connection) to frame ground and battery post + to the 12V wire to the camper.

And a failure after a repair suggests to check the repair, don't assume the new connector is still OK. ie In particular the lights working is not the 12V charge line.

Just to clarify: the camper interior lights and tv, etc were working off the truck battery (truck running) when I switched off the house battery switch in the camper. Now, when I run the truck and switch off the house batteries, nothing is working from the truck battery. But a voltmeter applied to the connector wire indicates plenty of juice. So the repair worked. Electricity is coming in from the pigtail. It’s just not making it to anything else. I’ll keep probing with the voltmeter and see what I can find I suppose.

Volt meter tests can be misleading because they virtually draw no amps. Test with a load.

It's too early in the morning for me to process and give an idea what's happening. But my suspicion is somehow you are miswired and have intermittently 12v positive on the ground wire. So you can read 12v in the camper but that 12v can't get out of the camper because there is 12v positive on on the ground.

Help! Lance 850 isn’t getting power from truck battery

opnspaces
Navigator II
Sep 09, 2023
It's too early in the morning for me to process and give an idea what's happening. But my suspicion is somehow you are miswired and have intermittently 12v positive on the ground wire. So you can read 12v in the camper but that 12v can't get out of the camper because there is 12v positive on on the ground.
CA_Traveler
Explorer III
Sep 09, 2023
Volt meter tests can be misleading because they virtually draw no amps. Test with a load.
Seminoe_Joe
Explorer II
Sep 09, 2023
Just to clarify: the camper interior lights and tv, etc were working off the truck battery (truck running) when I switched off the house battery switch in the camper. Now, when I run the truck and switch off the house batteries, nothing is working from the truck battery. But a voltmeter applied to the connector wire indicates plenty of juice. So the repair worked. Electricity is coming in from the pigtail. It’s just not making it to anything else. I’ll keep probing with the voltmeter and see what I can find I suppose.
CA_Traveler
Explorer III
Sep 09, 2023
And a failure after a repair suggests to check the repair, don't assume the new connector is still OK. ie In particular the lights working is not the 12V charge line.
CA_Traveler
Explorer III
Sep 09, 2023
OK on alternator but not battery suggests bad battery or connection. Load test the battery and test the voltage from the battery posts - (not the cable connection) to frame ground and battery post + to the 12V wire to the camper.

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Help! Lance 850 isn’t getting power from truck battery

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