Cig lighter/acc outlet - how to wire to shut off with ignition?

splice off the radio hot wire when turned on to your cig lighter with a inline fuse that will work

There is no radio hot wire, at least not on my 04. They now use a data bus that tells the radio when to turn on and off. Makes it a bitch to add an amp to the stock system.

Hook it to the RADIO FUSE

Yes, that's the BEST way to go. Pickup a heavy duty

12-Volt/30-Amp relay at any auto parts (~$4) or electronics store(~$6). The male spade terminals at the bottom of the relay are usually labeled:

(86) To switch [tap off radio or "ignition on" wire]

(85) To ground - this completes the primary circuit from 86 above which energizes the coil that "clicks" the relay ON

(30 or 51) Fused power [cut the red/hot wire and connect the battery-side cut-wire to this terminal]

(87 and 87A) To load/accessory [connect the cigarette lighter-side cut-wire to this terminal]

I use 18-ga wire for 86 & 85. Depending on the application, I sometimes put an in-line fuse (1-Amp fast acting/quick blow) between the tap and 86. Remember that the total load for 87 + 87A (if 87A exists) is 30 Amps.

Good luck. Franko

wire off the

1999~2005

lighter/accessory power ports

plugged in

engine is not

to shut off

appropriate fuses in

anything under

Anybody with

On my 94 all of the fuses are always on. They are now using the data bus to turn things on and off. Not nearly as simple as things used to be.

On the 2003 up you could use one of the many SEO switched pins in the midbec.