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The turn signals are controlled by the BCM
Turn Signal Lamps
The body control module (BCM) is responsible for controlling the turn signals and hazard lamps. When the turn signal switch is placed in either the left turn or right turn position, the BCM receives a signal from the turn signal switch. The BCM then sends an on-off voltage signal to either the left or right turn signals and their instrument panel cluster (IPC) indicator. When the hazard switch is pressed, the BCM receives a signal from the hazard switch. The BCM then will send an on-off voltage signal to all the turn signal lamps. All the turn signal lamps will flash including both IPC turn signal indicators.
I would suspect a problem with the BCM or maybe corrosion in the under hood fuse box . Wires from the BCM to the front turn signals go through the underhood fuse box.
Your best bet ,take it to a qualified repair shop that has a diagnostic scan tool that can read BCM DTC'S - diagnostic trouble codes
DTC B3948 Left Front Turn Signal Circuit
The body control module (BCM) controls the left front turn signal, hazard lamp, and daytime running lamp (DRL). The BCM supplies voltage to control the lighting functions. The BCM monitors the left turn signal lamp supply voltage circuit for proper operation.
DTC B3949 Right Front Turn Signal Circuit
If the rear turn signal lights are out, and the front lights are ok but don't blink then, the bad bulbs in the rear turn signals should need to be replaced. Or there could be a bad ground connection. Also, there may be two relays for front and back lights. Hope this helps.
No - headlight ok. The reason that the Right turn signal blinks fast is that there is half the normal load (resistance) on the right side, since the Right front turn signal isn't working. Since you replaced the Right front turn signal bulb, your problem lies in the bulb socket or the wiring to the socket. (1) try cleaning out the socket - there's probably a contact problem in the socket. You may need to squeeze the contacts together to provide good contact to the socket contact. (2) if contacts inside the socket are ok, try back-probing the socket - to make sure that the socket is getting 12V DC to light the bulb. Replacing a bulb socket is easy, and commonly done. Any auto parts dtore should be able to sell you a new socket - its just a matter of cutting out the old one, and then splicing in the new one. Most shops will use small wire nuts, buried under several wraps of E-tape (electrical tape). (3) if bulb AND socket ok, you have the worst problem known to man - a wiring fault. In this case, you'll want to run a new wire from the flasher module (under the dashboard) to the turn signal.
If you have changed the blinkers over to LED lights , you need to put diodes on the wires to stop the fast flash. Honda turn signals Have to grounded to the green ground wires in the harness. You can not ground them to the frame or other wires or the flasher system will not work correctly. Double check that all the wires are connected to the harness correctly (They are color coded). Blue with white band is the same as blue with white stripe. Orange with white band is the same as orange with white stripe. If you have crossed the wires on the front turn signals you may be powering the rear turnsignal with the running light. The running light is the dimmer half of the bulb. The turn signal/flashing light is the brighter side of the bulb. Inspect your wiring carefully.
One light is brighter because the turn signal light wire is switched with the running light wire. The wires are color coded should be an easy fix. As for the fast blink, if you have put led lights on the signals you will have to also add a diodes to correct the fast blink.
you may want to trace your wires to that light and check to make sure that your ground wire for that side is clean and tight that may take care of your problem all together
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