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Old 05-11-2013, 01:19 PM   #1
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Dash lights on, gauges jump. Low voltage to dash.

Any ideas.... When I twist the headlight pull switch to turn the dash lights on, all the gauges including my tach, drops down like there is a low power issue. I have all new batteries and the voltage from the alternator is putting out 13.8 volts to the batteries.

Is there a voltage regulator somewhere that lowers the voltage to the dash because if I remember correctly, I am only getting 11.8 - 12 volts max to the dash.

Any suggestions what to begin looking for and where?
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Old 05-11-2013, 01:33 PM   #2
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We had a problem similar about 1 1/2 yrs ago. Turns out the plug to the voltage regulator was not staying plugged in. Not sure about what your engine looks like but I do have a pic of what ours looks line on my blog. We ended up zip tying it up to keep it plugged in.
For us there were also 2 purple wires that seemed to do some weird electrical things when not connected all the way. Those are down in the bay where the main electrical wires and stuff go thru.
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Old 05-11-2013, 09:43 PM   #3
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Positive 12v connections are all good how about your return to the batteries the negative connections on batteries, chassis frame, negative wiring connections on your fuse panels, grounds for inverter/converter to chassis frame.
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Old 05-11-2013, 11:55 PM   #4
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Anyone know where the voltage regulator would be found on my rig, or have a link to a picture of one s I know what I am looking for.

I will begin searching out the grounds, should I start at the dash, ignition or alternator?
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