James Roberts

Ok. I give up. I have a 2016 F-150 XLT 4X4. It has Sirius Radio Built in and has the grey plug in the back for the Kicker upgrade. I bought the WPT-1212 harness, wired it up just like ALL the posts say, (all I'm using is the remote turn on, bottom left, and the positive input, 2nd from left, and negative input, 3rd from left.) I had this wired to a Polk 2 ch amp. With the leads wired to a spliced RCA connector. That triggered the amp to go into protection mode. I know this because I unplugged the RCA cables and the amp came on. I figured it was a high signal, so I got a line output convertor and wired it in. This time the amp stayed on, but still no sound. I tried every setting I could with forscan, I can only get the remote turn on to work. Why cant I get any sound? Some people hook into the plug and have sound. Any advice? If it is multi-meter advice, I have one but dont know the settings on it to use it. Please help!
Thank you,
Frustrated in SC

17Sport

I'm in the same boat.. did the same things as you I ended up running a remote wire to fuse 23 to get the amp to turn on.

Did all the settings in Forscan also, but still no sound from the rear plug

I'm about to install a LOC to get the RCA out...

Hope we can get some answers!

James Roberts

My LOC didnt help at all

17Sport

I'm thinkning that I would connect the LOC into either the front door speakers or the rear door speakers, picking up the signal from behind the factory head unit or from under the kick pannels along the floor....

dhmcfadin

Don't use rear channels. Fronts only. Grab the for-11ck harness so you don't splice the oem harness. Yes, it can be used for just a sub amp.

James Roberts

Where does the for-11ck harness go? Im afraid I dont know anything about that one. All I've heard about was the wpt-1212 harness.

dhmcfadin

In line the with headunit harness in the dash.

James Roberts

50 bucks for a harness just to get a signal to the back for a sub is crazy! I have the Sirius radio, and its an XLT. The gray plug is there. When I activate it with forscan, the remote wire activates and turns on my amp. I just want the plug to give me the signal like its supposed to. Anyone know the correct settings in forscan? I have tried everything, I spent 38 bucks on a plug and all I can get out of it is a remote turn on? Thats just not right.

jdunk54nl

You followed this post? Seems they got it working by using that harness at the back of the truck.
https://www.f150forum.com/f118/facto...48088/index10/

James Roberts

Thanks jdunk54nl, I read every page, still no sound. I dont get it.