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Old 09-07-2020, 08:05 PM   #1
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Brand: Thor Motor Coach
Model: Windsport 34J
State: Washington
Posts: 118
THOR #14595
UPDATE - Inverter Problem

A few months ago I posted about a problem I was having with my Xantrex Pro 1800 Inverter. I was having intermittent problems with it pooping out, giving low voltage errors, etc. Today I finally figured out the problem. After load testing the batteries, measuring the output of the cables at the inverter and isolating and measuring the voltage across each battery cable I could not reproduce the problem. Then it occurred to me - leave the system on with a voltmeter hooked up in the battery bay and at the terminal ends for the inverter and start wiggling wires. BINGO.

This is the in-line fuse coming out of the battery bay to the inverter. The arrow is pointing to the loose connection.


Here I am under the rig giving the wiring bundles a wiggle. I could see the connection rotating on the post.


Once I got a wrench on the post it turned nearly 1.5 times before getting snug. After this everything worked perfectly.

Thanks to everyone who has pitched in to help me on this. I hope my learning can help someone else troubleshoot an error faster than it took me. Bottom line - intermittent problems can nearly always be tracked back to a connection or exposed wire.

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Old 09-07-2020, 08:16 PM   #2
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Brand: Thor Motor Coach
Model: ACE 27.1
State: Florida
Posts: 9,792
THOR #7035
As predicted, what? almost 4 months ago? I'm glad it was just a loosw connection and not your inverter as you originally feared.
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