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Newport
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I have done a bare frame rebuild on a 1983A and there were only 7 of these imported to Australia. All electrics work except that the air compressor will not operate and the temp gauge only shows one bar at a time.

The earth for the air comp goes via the instrument panel not straight to frame as does most other stuff.

If I run an earth direct to frame from the relay the compressor runs but I have no readout on the temp gauge which is designed to convert to an air pressure readout when the compressor is run.

I have checked continuity on almost every wire on this bike, purchased another used instrument panel ( i have no history of it as it was an Ebay purchase) and even the other panel has the same issues so maybe it is external to the panel?



I will happily accept even the wildest ideas and go check if you have any knowledge in this area.

No circuit diagrams are available for the electronics in the instrument panel.
 

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Premium Member
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If the compressor works grounded to the frame, the ground through the panel isn't working. That may be the root cause of the whole problem, ie a bad ground.
 

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I believe the ignition switch has to be in the park (p ) for the compressor to operate. Have you tried that?
 

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Still Learning
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GLGREZMONKI wrote:
I believe the ignition switch has to be in the park (p ) for the compressor to operate. Have you tried that?
Not for the suspension, just the outlet.
 

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Newport
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Discussion Starter #6
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Having purchased another used panel and tried it with the same result and having no diagrams for the internals there is little I can do to verify what is going on inside the electronic componets.

I tend to agree that this is an earth issue but as the earthing for this circuit also brings up the air pressure gauge it must be through the instrument panel.

I have seen another instrument panel for sale but at USD300 plus postage down under that is a pretty steep trial to see if it is any different.

I have had input from a local auto electrical shop who although thaey are yet to physically check the bike they have offered about all the help they can via circuit drawing supplied.
 
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