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Turn signal issues

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Old Jul 22, 2018 | 11:29 AM
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Turn signal issues

07 F150 Lariat 5.4. I drove to a buddy's house and parked started the truck and the right turn signal was blinking rapidly. Bought new bulbs but didn't fix the issues. Shot for power at the connection and got nothing. Shot for power at the trailer lights and got fluctuating volts on a pin. Work my way back to the connection module but don't know where to shoot. I received no voltage from any pin. I can't find where to shoot. Does anyone have a beat on schematics? I'm having a hard time finding anything. Any tip for troubleshooting? I work on Hueys and Cobras so troubleshooting isn't hard when I have a schematic.
 
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Old Jul 22, 2018 | 11:58 AM
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Update

Originally Posted by palmettovmp
07 F150 Lariat 5.4. I drove to a buddy's house and parked started the truck and the right turn signal was blinking rapidly. Bought new bulbs but didn't fix the issues. Shot for power at the connection and got nothing. Shot for power at the trailer lights and got fluctuating volts on a pin. Work my way back to the connection module but don't know where to shoot. I received no voltage from any pin. I can't find where to shoot. Does anyone have a beat on schematics? I'm having a hard time finding anything. Any tip for troubleshooting? I work on Hueys and Cobras so troubleshooting isn't hard when I have a schematic.
Update. Both the right brake light and the right rear turn signal do not work. I'm getting power for both at the trailer light hook up.
 
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Old Jul 22, 2018 | 04:24 PM
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Old Jul 30, 2018 | 09:53 AM
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Most likely the TS switch will need to be replaced. If the contact in the switch for that side is bad then it would appear to the system that the bulb filament is broken so it sends the rapid flash bad bulb signal.
 
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Old Aug 4, 2018 | 02:50 PM
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I had similar symptoms on my 05, but on the left side. A new multifunction switch this morning cured it.

~Steve
 
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