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Old 01-09-2019, 07:15 AM   #1
Loner
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Angry 98 Sun Sport 454 Chevy GMC 12V ISSUE Again

My fellow friends. The trying to be a troubleshooter is back. Haven't give up yet but close. Sitting for a month with shore power, will crank but will not stay running unless i press and hold the battery switch. I have replaced both batteries, generator, fuel pump. Two switches inside entrance suppose to light when things work normal one lights the other don't. ANY ADVICE WILL BE APPRECIATED. I do own and know how to use a Volt Meter.
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Old 01-09-2019, 08:07 AM   #2
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This shouldn't be too hard.

Let me get this straight;

Are you saying that you have to hold the battery connect switch down to get it to crank the starter over?
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Old 01-09-2019, 08:24 AM   #3
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Here's what I think the problem is;

You have to push the switch to crank it. When you push the switch it connects the two battery systems. This is supposed to happen when you turn the key on also. So you have a blown fuse in the ignition to battery solenoid connection. The fuse is in the fuse box down by the driver's feet. Change out that fuse and your batteries should connect when you turn the key.

On top of that problem you have a draw on your engine battery. Over time it goes dead.
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Old 01-12-2019, 01:36 PM   #4
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Key turned on in ignition no volts on meter, i press and hold the dash switch that joins chassie & coach batteries together i get a 12V reading and the engine starts. If i release the switch the engine stalls. As long as i hold the switch down the engine will run.
At the side door entrance is a BATTERY DISCONNECT panel with a COACH & CHASSIE switch. When i turn the coach switch on it lights up, when i turn the chassie switch on nothing happens, it did light up when i first got the camper.
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Old 01-13-2019, 07:05 AM   #5
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Quote:
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Key turned on in ignition no volts on meter, i press and hold the dash switch that joins chassie & coach batteries together i get a 12V reading and the engine starts. If i release the switch the engine stalls. As long as i hold the switch down the engine will run.
At the side door entrance is a BATTERY DISCONNECT panel with a COACH & CHASSIE switch. When i turn the coach switch on it lights up, when i turn the chassie switch on nothing happens, it did light up when i first got the camper.
Well then I nailed it! Fix the circuit from the key to the transfer relay. Most likely that fuse I posted about. Then find your draw on the starting battery.
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Old 01-13-2019, 12:04 PM   #6
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25AMP Heater fuse blown only no others, replaced, no fix. Thanks i will work on circuit to transfer relay when it warms up a bit.
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Old 01-20-2019, 03:20 PM   #7
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Quote:
Originally Posted by Loner View Post
My fellow friends. The trying to be a troubleshooter is back. Haven't give up yet but close. Sitting for a month with shore power, will crank but will not stay running unless i press and hold the battery switch. I have replaced both batteries, generator, fuel pump. Two switches inside entrance suppose to light when things work normal one lights the other don't. ANY ADVICE WILL BE APPRECIATED. I do own and know how to use a Volt Meter.
Most vehicles have a RELAY that is energized by the IGN switch, and controls POWER TO those (required items); IF (during battery change out) you did not miss reconnecting a smaller wire to the battery, then I suspect you have a BLOWN FUSIBLE LINK? This can be a wire that looks like an insulated wire, but insulation will look wrinkled/ overheated if blown; or it can be a bolt-in/ screwed down mounted fuse? (Might) even have a RESET button, but many do not? Did anyone cross jumper cables during previous problems?
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Old 01-20-2019, 07:06 PM   #8
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I did all the jumpering and do not remember cross jumping, i don't think i did. Thanks for the info i really need all the help i can get. The closest Tech that will come out is 78 miles away and i simply cannot afford. About the fuses;; I found 2 in line both were good. They are two on each solinode all good, i did meter them not just look. I will look more closely tomorrow, they are so many wires under the stearing wheel and the hood that i am very confused. Thanks for hanging in here with me i know i can do this with all you'alls help
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Old Yesterday, 07:53 AM   #9
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Quote:
Originally Posted by Loner View Post
My fellow friends. The trying to be a troubleshooter is back. Haven't give up yet but close. Sitting for a month with shore power, will crank but will not stay running unless i press and hold the battery switch. I have replaced both batteries, generator, fuel pump. Two switches inside entrance suppose to light when things work normal one lights the other don't. ANY ADVICE WILL BE APPRECIATED. I do own and know how to use a Volt Meter.
Not much wrong. No fusable link problems if it starts. What you are describing is simply a discharged cranking battery and a blown fuse from the ignition.
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Old Yesterday, 07:57 AM   #10
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Find the solenoid that clicks when you press and hold the battery switch. Find the white wire that leads to it. This wire should be energized any time you turn the key. There's a blown fuse in that circuit.
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