Wiring Diagram

by audionewb
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I was wondering if you guys know where I could find a wiring diagram for a 1989 Ford mustang.


Replies (5)
Swez on 04/4/2003 16:08:34
You might want to go to the library and see if you can find a Chilton's or Hayes manual for that year vehicle. Most of these manuals have wiring diagrams on the basics for your car.

What specifically are you looking to do?

Swez

audionewb on 04/4/2003 17:58:08
I need to put in a car stereo for this guy and unfortunately the harness isn't there, so I don't exactly know which wire is which. I was thinking about using a voltmeter to figure out the wires, but I don't know exactly what I should be looking for to find the ground, and the ignition wire. I know the battery wire should have +12v.


Swez on 04/4/2003 19:12:36
Think that "ttocks" is the best guy to answer your questions in detail, but for starters, the ground i s easy... the whole body/chassis is ground. So tapping a wire into the floor pan, is your ground source. Just be sure you go to bare metal on that. A #6x1/2" self tapping sheet metal screw will be fine for wire termination to pan.

The other two wires you'll need, are a constant +12 volts which is on all the time for clock and often the cigarette lighter. The other +12 volt wire is ACC/IGN wire. This wire is only "hot" when the key is in the ACC or run positions.

The rest of the wires needed, are from the HU to speakers, power antenna, (if used) a remote power feed line and possible RCA wires for outboard amps.

Both power wires mentioned are easy to find at the interior fuse box. Using a volt meter or 12 volt test probe light will work for this hunt & find process.

Do you have to install speakers on this car or use the existing ones? If using the existing speakers, these wires usually come in color mated pairs. One wire is solid (+) and the other has a stripe (-). There are usually 4 sets of these. One to each speaker location. Finding them in the dash, may prove challenging. If you are lucky, there is a factory harness that has them in a single plug. If they are loose and no harness, look for paired wires (#16-18 gage) that have been snipped clean. You can determine the OEM wire colors by pulling each speaker and check the wire colors. If you cannot find the OEM wires, install new ones to each speaker location.

Use crimp type barrel connectors to join all wires. The blue ones are fine for light hage wires. The yellow jobs are best for the thicker power feed lines.

Hope that helps,

Swez

PS Don't forget to use inline fuses for the power leads to HU. In most cases, a 10A fuse is adequate.

FYI: Once you have identified the ACC/IGN and Constant wires, good idea to do all your wiring with the battery disconnected at ground terminal. Saves you time hunting for blown fuses later... if accidently short a hot link while wiring.

ttocs on 04/6/2003 14:28:24
I can get that for you when I get home tonight.. Are you wanting it for deck wiring, or for something else? If it is for a deck you will need to see if it has a premium sound amp. It is a octacon shaped silver piece of metal that would be located below the radio. It looks nothing like an amp should.

And just a word though, ford in that era never seemed to have the same wire colors.

Also, v-8 or v-4? That year the lx 5.0 was one of the fastes production years made. It takes very little to really get it going..

Swez on 04/12/2003 18:53:43
Bump ^



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