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Old 12-21-2018, 04:37 PM   #1
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Smile 1991 Caterpillar 3208 Engine Alternator Wiring

Hi I need a picture of the back of the alternator wiring on my engine. Wires were modified by previous owner. not charging batteries and have to disconnect the yellow wire to shut motor down, Any help will be appreciated. Holiday Rambler limited 40ft.
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Old 12-21-2018, 05:02 PM   #2
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I don't have anything specific to your engine/coach - but I have this picture of the DUVAC setup (which you coach probably has) that shows the back/wiring for the two model alternators most commonly used.
maybe this will be of some help.
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Old 12-21-2018, 05:27 PM   #3
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Hi Thanks for the diagrams. My alternator is not like this. I will post a pic and describe the wiring adjacent to the alternator.
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Old 12-22-2018, 02:53 PM   #4
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2 wires to figure

Hi I am down to 2 wires to connect on my alternator. The yellow wire from the keyswitch and the yellow wire from the fuel solenoid are mounted correctly. The remaining wires are red and green. I am assuming the red wire is the sense wire but i have no idea what the green wire is for. Any help will be appreciated
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Old 12-22-2018, 04:14 PM   #5
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Quote:
Originally Posted by jagoldtimer View Post
Hi I am down to 2 wires to connect on my alternator. The yellow wire from the keyswitch and the yellow wire from the fuel solenoid are mounted correctly. The remaining wires are red and green. I am assuming the red wire is the sense wire but i have no idea what the green wire is for. Any help will be appreciated
Possably the battery light on the dash.
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Old 01-10-2019, 03:40 PM   #6
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Smile engine running on when both yellow wires are connected

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Originally Posted by twinboat View Post
Possably the battery light on the dash.
I hooked up the yellow wires and the red wire and the engine starts immediately, It will not turn off with the ignition. Removing one yellow wire stops the engine. With the yellow wire from the fuel solenoid hooked up and the other yellow wire from the dash area (ignition ? ) disconnected the engine starts and runs and turns off with the key. however the batteries are not being charged. Hooking up the second yellow wire charges the battery but the engine will not shut off with the key. The green wire appears to be a ground wire but I cannot find a source for it. any suggestions will be appreciated.
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