fast blink turn signal

[GHedger]

my 08 5500 has a rapid L turn. All the LEDs are working properly. The problem is that the body upfitter has wired my body lighting into the factory brake tail turn assembly . My question is can I eliminate the factory light assembly and if so how? The light assembly is under the body and is not used other than to complete the circuit. The socket for the bulb is bad and the dealer wants $78 for it. Thats a lot of money something that can't be seen. Thanks ahead of time for any input and help.

 

[HBarlow]

If I understand what you are saying, the upfitter who installed your bed left the OEM tail/stop/turn lights that were mounted on the C&C at delivery on the truck but under the bed out of sight. Is that correct?

The upfitter would have done that if your aftermarket bed has LED lighting because LEDs by themselves, do not provide sufficient resistance to complete the lighting circuits.

The preferred method is to add a resistor in series with each LED at each lamp to provide adequate resistance. The additional resistors cost several dollars each plus the labor to install so your upfitter took a cheaper shortcut.

I purchased and installed an aftermarket CM flatbed for my truck. It came with ordinary incandescent lights which I didn't like much. I purchased and installed LEDs of the same size and shape and also purchased and installed resistors specially selected for that application to make the LEDs work.

It's been four years since I set my truck up and my memory is not clear any longer. This may be the company where I purchased the LED lamps and resistors:

LED VS BULBS

You can try calling or emailing them to inquire about the high wattage resistors you'l need in order to remove the tail/stop/turn signal lamps.

Check with this company also:

http://www.superbrightleds.com/cgi-bin/store/index.cgi?action=DispPage&Page2Disp=/mini-wedge.html

I saved these two links years ago. One of them is the correct source for LED series resistors.

 

[GHedger]

yes that's how it was done. I wasn't sure if I could delete the factory lights( my dealer made it sound that way). I wasn't sure were to source the info to find the correct size resistors. My only other fear is frying my lighting module(body control module?). Thanks

 

[HBarlow]

I don't know why you need to find the module you mentioned.

The C&C has a harness running all the way to the end of the left frame rail when delivered by the dealer. The rear tail/stop/turn signal lamp wires are in the bundle and if you go to the Ram website and locate the Body Builder info you can download and print a multiple page information document including electrical harness detail.

 

[GHedger]

The concern isn't finding the module. The wiring on the trucks are more sensitive than in the past, I believe it's due to multiplex wiring. The module "senses" resistance at a given location (l/f marker,r/f turn or whatever). If a given bulb burns out (high resistance) it will cause a bulb out message on your EVIC (my chassis is a Sterling and does'nt have the option). I'm writing this from memory and may not be 100%. The module has a baseline voltage or resistance (not sure which one). If you were to add to much incadesant lighting and cause high resistance or replace all your lighting with LED and lower your resistance below what your module "says" is ok, it would cause a fault. You then need to reset the module, after three resets the module then needs to be replaced. That is why I am concerned about using the proper resisters when trying to eliminate the incadesant bulbs. Again this info may not be 100% but I found this info either here from TDR or it was online from the Dodge upfitters site.