20 Most Recent JBL BP1200.1 Car Audio Amplifier - Page 5 Questions & Answers

If your head unit does not have an output for remote amplifier turn on, you can also use the power antenna remote turn on and run that wire to your amp. Or you can run a small 14 gauge wire from your battery along with your amp power wire, just make sure you put an inline switch somewhere in your dash area. This will give you the option when to have your amp on. 14 gauge wire from battery, to switch, from switch to remote turn on at amplifier. Switch will turn on and off amp. Make sure you turn switch OFF whenever you turn car off or you WILL kill your battery.

ITS IN PROTECT MODE. EITHER ITS BLOWN OR THE SUB IS TRYING TO PULL TOO MUCH POWER. UNHOOK THE SUB AND SEE WHAT HAPPENS IF THE LIGHTS STILL BLINK THEN AMP IS BLOWN. IF THEY STOP BLINKING AND ONLY ONE STAYS ON THEN LOWER THE SETTINGS ON THE AMP AND TURN THE BASS AND VOLUME DOWN ON THE DECK TO LOWER THE AMOUNT OF POWER BEING PULLED FROM THE AMP.

I believe series.....hook a wire to the positive of one voice coil to the negative of the other.....with the remaining two wire that to the amp.....check on google to see if your amp is able to be bridged.....Most of the time on the bottom of the amp there will be a diagram or the the two outer speaker outs on the amp itself....let me knoe if this helps you...thanks

unfortunately that's going to be a labor intensive project. You will have to follow the wires to where they go and make sure that they are all tight.

Being that the sub stays on you know you are looking for a loose wire off the other amplifier or the head unit depending on how you are powering those speakers.

if you have two amps one for the subs and one for the mains its probably not the power or ground going to them since both are not shutting down but check where the power splits to each amp.


start at the amp that isn't working unhook the cables. Test that those cables have power and proper ground then make sure they go back on cleanly (no loose strands) and tightly. proceed to follow the power wires to where they are connected.and double check everything.

If you have access to a continuity and voltage tester that will make it a bit simpler.

Depending on how clean an install it is (no panels, speaker boxes amps or seats to remove) it shouldn't take more than an hour or so. I always recommend that connections to power blocks remain easily accessible as I have had to remove amps, subs and junk like neon to get at wiring and its always a nightmare.

hope that helps

You really should try to get to the amp. There might be a fuse blown. The glove box is fitted with a few screws which are hard to locate, but they're really there!