Content © 2012-2017 by American IronHorse Owners Organization.  Use of AIH Logo Licensed by American Ironhorse, LLC
NOTE:   Technical Information content is intended to help fellow members and is not here to be copied and sold.
Rear LED Lights / RHC - Testing
by “MC7”
How to Easily Test Rear LED Lighting and Your RHC WITHOUT Taking the LED Lights Apart All of the rear lighting wires come from the Relay Harness Controller (RHC), pass through a 6 pin connector (#85), and go to the rear turn signals, running lights, and license plate light. On a 2007 Texas Chopper, connector #85 (unlabelled) is underneath the seat and between the battery and RHC. (Pictures are #1 to #4, Left to Right) In picture #1, you can see connector #85 separated. (Look for the orange inserts within the connector shell halves). Picture #2 shows the connector shells lying atop the battery so you can see the wire colors. Picture #3 shows the female half on the left, and the male pin half on the right. This half has the latch. The female pin (left) shell comes from the RHC and the male pin with latch half (right) goes to the lighting. NOTE: AIH Convention: The Harness connector half has Female Pins and is always the “B” connector. The connector half which goes to the Devices has Male Pins and is always the “A” connector. (Think of “BHAD” ... B-Harness, A- Devices). If you refer to the schematic section in picture #4, you can see RHC pin #19 goes to ground and is a black wire. This black wire is in turn connected to the two black wires going to and through connector #85 pins 5 & 6. RHC pin #9 provides +12VDC via two blue wires to and through connector #85 pins 1 & 2 to the rear running LEDs and License Plate LEDs. RHC pin #6 provides +12VDC via a brown wire with a white stripe to and through connector #85, to the right rear directional LEDs. RHC pin #18 provides +12VDC via a violet wire with a white stripe to connector #85, then via a solid violet wire to the left rear directional LEDs. To check the power output from the RHC to the lighting, use a Volt Meter or test lamp. With your key switch turned on (your front lighting should be active) put the red (positive) meter lead on the blue wire female connector pins (pin # 1 & 2) and the black (negative) lead on the black wire pins (pin # 5 & 6). You should read +12VDC (test light should illuminate) and if so, this verifies the RHC is working properly and you have voltage to the connector. If there is no voltage present, the problem is either the wiring to the connector from the RHC, or the RHC and/or its connector. Sometimes the problem is corrosion buildup in the RHC connector. If upon separating the connector halves you find corrosion, you'll need to clean the pins using an electrical contact cleaner (available in spray cans).  You can disassemble the connectors and remove the pins for better cleaning, just be sure to sketch the two connector halves and location of each color wire and where it was originally located. Do one connector half at a time to prevent mix-ups. (NOTE - Refer to the Compression Release Repair article on this website for detailed information on Deutsch connector disassembly/assembly) If your tail lights still do not function, the problem lies within the wiring from connector to the lights or the lights themselves and if both tail lights are out, this seems to indicate more of a wiring problem as the odds of both LED lights going out at the same time is unusual. At this point you should trace the blue wires which provide power to the rear running lights. Since the turn signals and plate lights are working, this rules out a ground (black wire) issue for if the ground were disconnected none of the rear lights would function.
ORGANIZATION ORGANIZATION OWNERS OWNERS For All American Ironhorse Motorcycle Owners
Rear Lights
© 2012-2017   American IronHorse Owners Organization Use of AIH Logo Licensed by American Ironhorse, LLC 
NOTE:   Technical Information content is intended to help fellow members and is not here to be copied and sold.
Rear LED Lights / RHC - Testing
by “MC7”
How to Easily Test Rear LED Lighting and Your RHC WITHOUT Taking the LED Lights Apart All of the rear lighting wires come from the Relay Harness Controller (RHC), pass through a 6 pin connector (#85), and go to the rear turn signals, running lights, and license plate light. On a 2007 Texas Chopper, connector #85 (unlabelled) is underneath the seat and between the battery and RHC. (Pictures are #1 to #4, Left to Right) In picture #1, you can see connector #85 separated. (Look for the orange inserts within the connector shell halves). Picture #2 shows the connector shells lying atop the battery so you can see the wire colors. Picture #3 shows the female half on the left, and the male pin half on the right. This half has the latch. The female pin (left) shell comes from the RHC and the male pin with latch half (right) goes to the lighting. NOTE: AIH Convention: The Harness connector half has Female Pins and is always the “B” connector. The connector half which goes to the Devices has Male Pins and is always the “A” connector. (Think of “BHAD” ... B-Harness, A-Devices). If you refer to the schematic section in picture #4, you can see RHC pin #19 goes to ground and is a black wire. This black wire is in turn connected to the two black wires going to and through connector #85 pins 5 & 6. RHC pin #9 provides +12VDC via two blue wires to and through connector #85 pins 1 & 2 to the rear running LEDs and License Plate LEDs. RHC pin #6 provides +12VDC via a brown wire with a white stripe to and through connector #85, to the right rear directional LEDs. RHC pin #18 provides +12VDC via a violet wire with a white stripe to connector #85, then via a solid violet wire to the left rear directional LEDs. To check the power output from the RHC to the lighting, use a Volt Meter or test lamp. With your key switch turned on (your front lighting should be active) put the red (positive) meter lead on the blue wire female connector pins (pin # 1 & 2) and the black (negative) lead on the black wire pins (pin # 5 & 6). You should read +12VDC (test light should illuminate) and if so, this verifies the RHC is working properly and you have voltage to the connector. If there is no voltage present, the problem is either the wiring to the connector from the RHC, or the RHC and/or its connector. Sometimes the problem is corrosion buildup in the RHC connector. If upon separating the connector halves you find corrosion, you'll need to clean the pins using an electrical contact cleaner (available in spray cans).  You can disassemble the connectors and remove the pins for better cleaning, just be sure to sketch the two connector halves and location of each color wire and where it was originally located. Do one connector half at a time to prevent mix-ups. (NOTE - Refer to the Compression Release Repair article on this website for detailed information on Deutsch connector disassembly/assembly) If your tail lights still do not function, the problem lies within the wiring from connector to the lights or the lights themselves and if both tail lights are out, this seems to indicate more of a wiring problem as the odds of both LED lights going out at the same time is unusual. At this point you should trace the blue wires which provide power to the rear running lights. Since the turn signals and plate lights are working, this rules out a ground (black wire) issue for if the ground were disconnected none of the rear lights would function.
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ORGANIZATION ORGANIZATION OWNERS OWNERS
Rear Lights