[Bingobimmer]

SKIP TO NEXT PARAGRAPH FOR THE BIG QUESTION. Well the other day I saw my old JL amp and sub from my previous car just sitting around after months of trying to get them sold. So I thought why not just throw one in my e90! I didn't want to put both in because I don't really want a huge bass boom (Ideally just one 10in JL w3). So I thought one 12 would really fill the deep bass gap left by the logic7.

So I picked up a wiring kit and a technic harness. I used the e92 diy as a reference which was very helpful. I stared by attaching the power cord to the positive connection on the battery. Then I attached the ground wire to the frame, but NO POWER! Really confused on this. Any help would be greatly appreciated!

[ctuna]

Do you know how to use an ohm/volt meter.
1)The frame may be insulated at your ground point.
I would measure from which ever ground point to the negative battery terminal
on the battery . The kit I got took both wires are attached right to the battery lug.(not a Technic kit for power)
I hope you are using a fuse on the + side .
2)If you are using a hot wire that plugs into the battery distribution block not all the slots are populated with blades/fusible links so if you plug into a no blade slot there will be no power. You need to inspect the slots to find one with two blades.
http://www.bawarec.ru/manuals/3er/e9...3er-e90-12.pdf

see page 6 item 6

Be sure to measure for a low resistance ground and hot
connections and voltage at the amp terminals that make
sense before applying power.

[kaigoss69]

Amp power connections, as well as amp remote turn-on, need to be made separate from the harness!

[Technic]

Originally Posted by Bingobimmer

SKIP TO NEXT PARAGRAPH FOR THE BIG QUESTION. Well the other day I saw my old JL amp and sub from my previous car just sitting around after months of trying to get them sold. So I thought why not just throw one in my e90! I didn't want to put both in because I don't really want a huge bass boom (Ideally just one 10in JL w3). So I thought one 12 would really fill the deep bass gap left by the logic7.

So I picked up a wiring kit and a technic harness. I used the e92 diy as a reference which was very helpful. I stared by attaching the power cord to the positive connection on the battery. Then I attached the ground wire to the frame, but NO POWER! Really confused on this. Any help would be greatly appreciated!

Please use a multimeter at the 12V and remote turn on terminals of your aftermarket amp to determine what it is actually happening at your aftermarket amp. You should measure 12V constant at the 12V terminal and 12V at the remote turn on only when you open a door/trunk/car is running. LOC at harness -if LOC was supplied by me- should lit up when the remote turn on is activated.

[Bingobimmer]

Got it fixed! Thanks guys for all the help. Technic harness works superbly.