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Old 03-18-2013, 07:37 AM   #1
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Join Date: Jan 2012
Posts: 23
04 Alpine Coach,40' Right Side Turn Signals

When applying right turn signal the rear light flashes but front turn signals do not. Cannot find any broken wires for this problem and all bulbs in signals have been replaced. Also, need location for turn signal
flasher or flashers? Any information would be appreciated.

Jim & Pat
Baltimore, MD

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Old 03-18-2013, 08:08 AM   #2
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Join Date: Dec 2009
Location: Reno, NV
Posts: 170
Seen that problem with a bad turn signal switch in the steering column.

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Old 03-18-2013, 11:44 AM   #3
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Join Date: May 2004
Location: Auburn, CA, Havasu, AZ & Mulege, BCS
Posts: 5,263
Could be as gator suggests. Turn signal originates in SmartWheel w/the switch, travels by wire to the SW control box, then to the Vansco. Output LEDs 5 & 6 are RH & LH turn signal on the Vansco CMM2820 module behind the plastic kick panel in front of passenger's feet. You can verify those w/the turn signal running. The "click" and turn arrow indicators on the dash are part of the Actia gauge cluster, and these receive their signal on the J1939 CAN Buss twisted pair off the Vansco.

If there is no Actia arrow & click, then i'd speculate the switch in SmartWheel is the culprit. If you have click & arrow flashing, then its probably the output from the Vansco or the circuit wire to the bulb(s).

Your "flasher" is a computer function in the Vansco, outputing a pulsed +12V in 3 locations, one on front Vansco (the plug pin corresponding to the LED6 output), and two on the rear Vansco (pins to the rear bulb(s) & trailer plug turn spade).
Baja-tested '08 2-slide 36'
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