Lost all gauges and start button

Scott & Heather · May 24, 2017, 08:20:47 PM

So I'm getting ready for a test run with my new turbo boost sensor, cleaned bypass valve and new hoses, new intake and filter and new exhaust. Tried to start the coach from the drivers seat. Master switch on I can hear the clunk of the relay and headlights and dash lights turn on, but starter button doesn't do anything and all my dash gauges are flat lined. No power to them. Can someone point me in a direction and I'll hunt away. I can start coach from rear start box in engine bay but this needs to be fixed so I can watch gauges.

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gumpy · May 24, 2017, 08:24:50 PM

Probably a short blowing a circuit breaker or fuse.

eagle19952 · May 24, 2017, 09:02:08 PM

neutral switch...related ?

Dave5Cs · May 24, 2017, 09:42:38 PM

Put rear start switch back to Front Start?

muldoonman · May 25, 2017, 04:45:28 AM

Scott headed down in a few and email me your contact info (were you folks are lurking) . Will drop by and meet up. If you ever get over to SS mine is the only bus in back for a look. Hope you get the problem solved. That what makes this fun, all the fires to put out to drive them.

Scott & Heather · May 25, 2017, 05:53:35 AM

Glen I just private messaged you my phone number. It's my cell. I'll be around all day...

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Scott & Heather · May 25, 2017, 05:56:33 AM

Don I don't think so. It is intermittent, and my rear start switch is in the "front start" position. All gauges are flat. Ignition turns on fine, trans touch pad lights up and all gears work. So it has power. I'm going to have to chase this down

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Geoff · May 25, 2017, 06:02:19 AM

Since the last place you worked was in your engine compartment I would guess you dislodged a major connector that feeds the driver's area.

--Geoff

Scott & Heather · May 25, 2017, 08:00:52 AM

I didn't touch wires back there. Just replaced muffler intake and turbo boost sensor. Coach still starts and drives fine if starting from rear box. Just no gauges up front and start switch on dash is dead

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Scott & Heather · May 25, 2017, 08:01:30 AM

My electrical manual was accidentally left behind at my in laws house in Michigan.. anyone have a PDF source for 1992 MCI 102C3

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thomasinnv · May 25, 2017, 08:33:55 AM

Scott since it is intermittent I would be looking at a relay or main circuit breaker up front, or more likely a ground. If your bus is like my D series which I think is probably similar, the dash connects to the main harness through a set of big plugs. You might check there. Pull the dash and see if anything changes while moving the harnesses around.

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thomasinnv · May 25, 2017, 08:36:15 AM

I can send you a pdf of the front junction box schematic if you want. Might help with troubleshooting. Let me know.

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luvrbus · May 25, 2017, 08:54:54 AM

There is a ignition relay in the rear panel check it

thomasinnv · May 25, 2017, 09:10:02 AM

Quote from: luvrbus on May 25, 2017, 08:54:54 AM
There is a ignition relay in the rear panel check it

Would that cause loss of guages too?

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thomasinnv · May 25, 2017, 10:15:15 AM

Scott according to the master elec schematic there is a ground stud and a 24v stud behind the dash that the guages connect to. Might be a dirty/loose connection. I will look further and see if/where the start switch is connected to the loop.

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