boxhead

I recently traded in my 92 f150 for a used 2011 f150 screw with low miles. Nice truck!! The previous owner installed an Advent OFO1501 hu. First I replaced the door speakers-db 6501 in front, db 571 in back. Sounded better. Next I installed a Rockford Fosgate R600x5 for more power. Sounded good, but needed more low end. So, I ordered an SI BM MKIV & built a box based on Stormsearch's plans. When I first fired it up I got goosebumps. Dang, it sounded great!
My only issue is that when I turn the key to accessory there is a loud pop, but when I start the truck there is no pop at all. Power wire & remote wire routed down passenger sill. Remote wire tapped into fuse 38 with a mini low profile add a fuse. Rca's & speaker wires ran down driver side sill.
Does anyone have any ideas how to remedy the accessory turn on pop?

boxhead

Just looking for some help. I know I'm new here, but I know there is a lot of experience out there and someone else has been through this before, so if you have any ideas please share.

Weatherman71

http://www.metraonline.com/part/AFDI-5V this will solve your issue

Wyo11Scab

iTrader: (1)

You can try this but not sure it will work. This is used for Ford factory subs. Is there not a blue wire on the back of the HU for amp turn on?

Tallyman89

^ this. I have the Advent. It has been a couple of years since I installed it but I am pretty sure there is a trigger wire on the HU. No need to tap the fuse.

boxhead

Finally found the wiring diagram online for the Advent OFO1501 HU, & it shows a blue/white amp turn on wire in it's harness. Will have to pull the HU to find out for sure. If so, I will give it a try. Thanks for the input.

Wyo11Scab

iTrader: (1)

That would be the one!

boxhead

Well, I went & pulled the HU & it doesn't have an amp turn on lead. Go figure! The thing has rca outs so you figure it would have one. There is a red lead labeled ignition sw+ coming out of the radio harness that the reverse camera is hooked to, but I don't know if this will also work as an amp turn on lead & if it stays on until the door is opened. Guess I'll just have to try & see.

boxhead

Well, I went & tried hooking the amp turn on lead to the red switched ignition wire coming out of the radio harness & it didn't solve the accessory turn on pop. So I switched the lead back to the add a fuse in the fuse box. I don't understand why it doesn't pop when I turn the truck on, only when I turn the key to accessory & after I put the key in & turn it on after remote starting does it pop. I'm puzzled! I hate to, but I'm thinking I may have to install a switch in the amp turn on lead. Hopefully someone has a better idea.

RLXXI

Maybe adding a stiffener cap would help? Seems to me your getting a surge of current causing the "pop" the cap would absorb that.