PRIME LED 3157 3155 3457 4157 Switchback | 16 3030 Chipsets | Brightest | Dual Color Front Turn Signal & Clerance Light | Amber 700Lm White 900Lm (pack of 2)

I've tried an awful lot of switchbacks as I try to replace ones Amazon no longer sells, and these were the closest ones to the brightness (albeit with darker amber than a couple of them) and the same time delay between amber off and white one. They also have a neat sort of "fade in", which I suppose may not to be everyone's liking compared to the instant on and off of most LEDs have.However, whenever I buy something like this I always test everything, and these do have an issue in my install. While it looks like they run fine with the headlights on and the signals in (though running it with the engine running may change that, but I didn't check), what these did not support at all was the hazard lights with the headlights on. Instead of cycling amber-off-amber-off, therly cycled (bizarrely) dim-bright-dim-bright using only the white element. I'm not sure what it is about the bulb's implementation (none of the other I tried had this issue, even if they had others), but I cannot recommend them to anyone who owns a GM G-Platform car (Deville, Seville, Bonneville, Aurora, Park Avenue, Lucerne, DTS) as I thinking it may be related to how the turn signals and flashers are wired and I believe GM was consistent with how they wired them on that platform.

Lights function OK. Installed in 2000 Ford F250 Superduty. Installed 50W 6 ohm resistor with each bulb. Switchback works fine but when either parking or headlights are switched on I get hyperflashing turn signals. With parking and headlights off there is no hyperflashing. Still searching for a fix. Any ideas out there? Thanks in advance.

good quality product, item like as described, would buy more