Hazard lights not working on trailer

[al0vely]

When I had my trailer connected to my 2016 F3L the hazard lights worked. This was connected using a wiring harness with isolation plugged in under the passenger seat.

On my RTL the trailer lights don’t flash when the hazard lights are on. The run, brake, and turn lights all work. I am using the Showchrome isolated fuse block and wiring harness for the RT (item 41-201)and a Wesbar 5 to 4 wire trailer converter connector (item 707295)

Any ideas how to resolve the hazard lights not working on the trailer?

[IdahoMtnSpyder]

Where are you connecting the ground to the input of Wesbar unit? There is no ground on the output of the SC isolator according to the pic in the SC instructions. Do you by chance have the keyed power out from the SC unit connected to the input ground of the Wesbar?

[BertRemington]

Another possibility is circuit logic, probably in the Wesbar. In order to flash the Brake/Turn lamp for a turn signal while the brake pedal is pushed, the Wesbar must invert the turn signal (ie it turns the lamp Off rather than On because the brake signal had already turned it On). As part of this inversion, the logic defers to the brake signal for simultaneous turn signals. I'm curious if this is the circuit logic used.

[al0vely]

I contacted Value Accessories (VA) and was told to contact Show Chrome (SC) as they didn't know why it wouldn't work.

I ended up contacting both Wesbar and SC.

The only reason I purchased the Wesbar 5 to 4 converter trailer connector is because it was listed on the Value Accessories site as the combination to connect the trailer. They (VA) were out of stock on the Wesbar unit so I purchased it from Ebay - and VA has subsequently removed the Wesbar unit from their website. Wesbar said their unit would not work for my application using hazard lights and recommended a different product from their line up.

I contacted SC and the first person I spoke with said he had never seen it used as I was trying but asked someone else in the office and they said theoretically it should work especially with their 5 to 4 converter (PN 16-127). They have a 2020 RT in their shop and actually performed the connection to prove it worked for them. I purchased the SC 5 to 4 converter and got it hooked up today and it worked perfectly.

Also while I was waiting for my converter to arrive "vtrider" posted that he used the SC combination fuse block + 5 to 4 converter and everything worked well - so I was optimistic on mine working also.

I suspect the issue is the circuit logic of the Wesbar unit as mentioned by "BertRemington" as the support person at Wesbar mentioned something similar in different words.

[al0vely]

Where are you connecting the ground to the input of Wesbar unit? There is no ground on the output of the SC isolator according to the pic in the SC instructions. Do you by chance have the keyed power out from the SC unit connected to the input ground of the Wesbar?

The Wesbar ground was connected to the ground on the fuse block. This same ground is used on the SC 5 to 4 converter.