Simple Eletrical Problem..

[luke20t]

hey all

been installing a set of defi gauges.

when the ignition is on or car is running, i set the warning levels and the next time i start the car the waring levels have been reset.

it seems the starter motor cuts the power to the gauges..

i first wired the constant power wire to a 12v wire that goes to the ignition barrell. then i tried the constant power one at the back of the CD player.

anyone know what could be causing this?

thanks,

luke

[jeffworld2]

you must have the wrong wire then.

get the constant power from the radio, thats the easiest. do a test:

wire the constant and "ignition on" power wires to the what you THINK is the constant power wire. if you are right and it is constant power feed, connect the battery and gauges should come on even without putting the key in. if they are off, you were off and try the wire you were using as the switched power feed.

constant 12v is usually a yellow wire from an aftermarket cd player, switched power is the red one. constant meaNS STRAIGHT FROM THE BATTERY, without the ignition switch inbetween. this is the memory for things like the clock and stereo.

elsewise, run a small cable straight from the battery with an appropriate fuse, this is the foolproof way

[luke20t]

yeah i tested the wires with a mutimeter b4 i connected them.

the second one i tried is from the yellow one at the back of the cd player.

im thinking maybe my battery may be too small?

yeah next thing ill try is to run a wire straight from the battery and see if that works.

[luke20t]

and if i set the memory then turn the car off, then the next day turn the ignition on, the memory is still set until i actually start the car up.

edit**

problem found.. changed the ground wire and problem solved.

Edited October 14, 2007 by luke20t