Flashing BD lights on acceleration

[toggle1]

2013 raptor

I have the GJ Motorsports third brake light installed with three Baja design lights. They are hooked up by a harness to flash on Aux 3 and steady on Aux 4.

Under medium to heavy acceleration, the BD lights start flashing as if I switched aux 3, for the duration of the acceleration. As soon as I let off the gas, the flashing stops.

Any idea what’s going on?

 

[The Car Stereo Company]

where did you get power and ground for the lights? and what kind of flasher?

 

[toggle1]

All three Baja lights are connected to the Stop/Turn/Reverse/flash harness provided by GJmotorsports Which are then connected to factory aux switch 3 for the flash and aux 4 for regular “on.” The ground is the small 10mm bolt in the kick panel

Ford F-150 Raptor 2010-2014 3rd Brake Light with NMO Mount

OverviewOur billet aluminium 3rd brake light for the 2010-2014 Ford F-150 Raptor is the first light to market that allows for installation of 3 Baja Designs S2 lights and retains the factory styling of the light. CNC Machined from billet 6061 AluminiumUses factory bolt holesIntegrated gasket to

gj-motorsports.com

 

[smurfslayer]

I’d verify connections at the harness, then ground. If the symptoms persist, I’d suspect the harness. A little late for this now, but checking continuity on all the connections end to end within that harness might show an issue.

Did this setup ever work as designed; steady on with Up fitter 4 and flash only with up fitter 3 or did this work for a while and then begin malfunctioning?
(what happens when you have both up fitters 3 and 4 selected btw?)