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Electrical question (interior/radio)

414 Views 4 Replies 3 Participants Last post by  thedevilbunny
I finally fixed my charging problem by replacing the underhood wiring harness. Took a close look at the old one, and found out that where some strange splices had been made previously, there were no longer really any wires there--just melted plastic. /forums/images/icons/tongue.gif
Anyway, I got all ambitious and since the Mustang is my only car now, I decided to try and install the cd player (really cheap one I should probably add) I had in my old dd into the Stang. Well, it's in (glovebox) and it works, but it doesn't work very well. The illumination on the cd player flickers constantly, sort of in time with the engine when it's running. If I turn on my lights it cuts off the power to the cd player and activates my turn signal lights on the dash, but not outside the car (does this have something to do with the flasher being the circuit breaker for the radio?). I also seem to lose power to my dash gauges (oil pressure in particular) if I try to run the lights and cd player together.

What I'm wondering is if this is due to my alternator not putting out enough power (just had it tested, I believe he said 12.something volts at idle and 14.something under load) to run everything at once, or if the problem lies in the wiring, and either way if there's something I can do about it? I'm just learning this wiring stuff, so bear with me if this is a silly question./forums/images/icons/smile.gif
1 - 5 of 5 Posts

I have a similar problem with my '68
What I did is I ran a seperate wire back to
the battery.Seemed to help,but still some flicker.

· Registered
1,515 Posts
Sounds like you need to get your power from another source. It sounds like (to me, no electrical expert) that you are wired into the small voltage regulator for the dash lights.
Maybe you should try to wire it to the hot side of the ingition switch. This should give you enough power to run the radio with no problems with the lights.....just a thought....good luck.

· Premium Member
18,946 Posts
Agree. If you don't want to run a separate line, try tapping into the cigarette lighter. Just don't run the lighter and/or the emergency flasher along with the CD player. Since the car is not concours, I'd strongly recommend separate power line from the battery (fused) and a good ground cable back to the battery as well. If you do run these two lines, twist the heck of 'em ttogether o reduce induced RF interference.
1 - 5 of 5 Posts
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