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Old 08-16-2016, 10:45 AM   #1
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HWH 610 levelers

I have no lights on control panel, the manuel said check the 5 amp fuse on control panel. checked fuse was blown, changed it but keeps blowing checked amps to fuse looked like around 8amps and 13.2 volts any ideas on what could be wrong?? Thanks Al

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Old 08-17-2016, 08:53 PM   #2
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Short somewhere. That IMO is the hardest thing to find in a 12V system, except perhaps a poor ground.
The only practical way to locate the short is by tedious testing with a VOM and a plan of action/testing.
Have you phoned HWH yet? They are quite helpful, but it may take a few days for the return call, as they are very busy during warm months.

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Old 08-17-2016, 09:46 PM   #3
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You have a short somewhere. Quite possibly in the feed to the control. In trying to find a short, you have to look at and follow the wiring harnesses and look for obvious damage to the harness. Sometimes simply moving a harness around will fix the problem. I would suggest you substitute a 5A automotive circuit breaker in place of the fuse. It will be clicking on and off but it will allow you to do some troubleshooting with the circuit basically powered up.

Sometimes you can take a magnetic compass and use it as a short finder. Simply follow the wiring with it with the circuit powered up. The needle will point towards the location of the short. So, if you put the compass on the harness at the switch unit it will likely point away from the switch. If you go to the main pump/controller unit and place the compass on the harness there, you will probably find the needle pointing back at the switch. So you know the short is between those two points. Then you can start working your way one way or the other. Once the compass changes direction and starts pointing back the other way, you know you have passed the short.
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