My 100th Anniv Fat boy came without turn signals. There are no wires to the bars or rear fender (other than brake lamp). Does anyone know (or have documentation) to install turn signals? The signals I purchased to install assumed the wiring was already there.
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Re: Turn Signal Installation
Wow how did that happen , they should have, well you can by a after market kit that comes with the wiring harness for frt and rear. if it was me thats what i would do . that way you can install some costom lights be ready through they are not cheap kdc744
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In the diagram for rear lamp, the top wires are voltage, the bottom black wire is ground. The brown wire on either side should be tail lamps, goes hot when you turn on the headlamp switch. The other top wire on either should be for turn signal. With everything turned on, is there voltage on that wire?
Because the front works and the rear don't, possible wiring circuit problem? The voltage for turn signals comes from bcm. The bcm knows when you turn on turn signal switch, either side, then the bcm sends voltage to turn signal lamp at the rear and front.
If you need to remove the tail lite, brake lite and signal light harness start by removing the seat. Then disconnect the negative battery cable. Then detach the rear electrical harness connector. Then locate and follow the wires for the taillight and signal lights to the connector (8 pin) under the seat area and separate the connector. Then cut the cable tie strap holding the wiring harness to the frame and pull the harness through the fender opening. Then follow the conduit/harness back to the fender hole where the wiring exits the fender underside and enters the tail lite housing and backplate. This is not necessary for removal of the tail/brake lite assembly or the signal lie assemblies.
If you want to remove the tail/brake lite assembly remove the tail light lens and the with a small screwdriver depress the small tang in the tail lite four wire Multilock connector and remove the tail lite and then do the same and release the two wire signal light connectors one at a time from the tail lite base and remove the signal light connectors. These smaller two wire Multilock connectors are on the left and right sides of the base plate in the centre portions of the base plate where the 4 wire tail lite connector on the left side of the base plate is located and the wiring harness connector of the wires from the front of the bike to the base plate on the right side. The wires from the left and right signal lite assemblies go from these connection points on the base plate out through each side of the base plate and into the area under the back of the rear fender to each signal lite assembly. Then similarly release the Multilock connector of the harness from under the seat to the tail lite base. When you have disconnected the connectors from the base plate and have routed the wire harnesses out into the area under the fender you can release them from the wire clips at each side of the under fender areas. Then for each side remove the lamp support by unscrewing and removing the fastener and washer inside the rear fender, after which the lamp housing can be removed from the lamp support by pulling it and the wiring you disconnected from the tail lite base out through the lamp support. If you wish to release/remove the tail lite base undo the fastener and remove it.
The wire connection should plug into the taillight. Remove the lens and you will see what I'm talking about. You will need to remove the black connector after you unplug it and probably cut the silver plug off to get the wire through the standoff. If you're good at soldering, just cut wires about 2 inches from the black connector and solder them back together and coverr the splice with heat shrink when finished. Good luck!
1. Follow the taillight and rear turn signal wire harness to the 8-pin connector under the seat. Separate the connector. Remove the seven wires and the attached socket terminals from the connector.
2. Cut the cable strap from around the harness in front of grommet in the fender. Pull harness thru grommet in fender.
3. Remove (from underside front of fender) screw and washer from speednut on frame.
4. Remove turn signal lamps.
5. Remove screws and washers from rear of fender supports.
6. Remove license plate bracket.
7. Remove screws and washers from front of fender supports.
Here's my 2 cents... you need to remove the seat, saddlebags, disconnect battery, dsconnect the wiring harness, remove the signal lamps and the hardware securing the fender. There are torque values u need to know when installing the new one. This is all in the service manual for your model. I would go to the dealer and get one, you want all the specs correct and thats the only way to get em
This is going to be one of three things, and you should check them in this order, 1- you have a loose connection, bad/broken ground wire, or an exposed/bare wire on, around, or in line with the rear signal that is staying on. It's common for the wiring insulation to rub through and short at the bend where the signal wires go through the signal mount and run down the rear fender strut. 2- the switch on the bars is sticking or malfunctioning, however, this is less likely because it usually causes both signals to remain on. and 3- the flasher relay has malfunctioned and needs replaced. I'll bet that this is a bare wire, so start by tracing the signal wires for the right side. If you don't find a bad wire, then replace the relay. Let me know what you found out.