Question about Cars & Trucks
For most systems Black signifies Ground -
You can use a Voltage meter and measure the voltage from a wire to ground of the box or the vehicle and see which is which.
Using a test light in the same way but instead of knowing the amount of voltage you will just get a light proving that power is flowing from the wire to the ground.
Posted on Oct 02, 2016
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Posted on Jan 02, 2017
the brown wire on your suburban will be your park lights and the yellow will be brake/turn are you sure the green wire is ground on your led lights? i would think the black wire would be ground
Posted on Nov 25, 2008
SOURCE: I have a 1971 with
Last time I looked, black was always the ground... But, been wrong before.I'd check with parts guy to make sure you have the correct motor. If it replaces original design there is usually a sheet with wire re-route diagram. If not, use a volt meter to determine which wires are carrying voltage in the vehicles harness connector. One may have less volts than the other... I would assume the one closest to battery voltage is high speed. one should be ground. If both carry voltage then the case is ground.(usually in this case there is a spade terminal on one of the attachment screws, and a seperate ground wire.) If your new motor has three terminals, it's likely that one is ground, one low speed one high. (though I can't remember ever seeing this arrangement.(speeds usually controlled with resistor block) Again, if this is the only motor available, at worst, I'd tie both power leads from the motor together (making sure that one lead is not a ground) and connect them to the harness spade that carries 12v, make sure there is a good ground, and use as is. But, do some research first.
Posted on Dec 30, 2008
Here you go...
1995 Mercury Villager Car Stereo Radio Wiring Diagram
Radio Constant 12V+ Wire: Green/Purple
Radio Ignition Switched 12V+ Wire: Yellow/Black
Radio Ground Wire: Black/Light Green
Radio Illumination Wire: Green
Radio Dimmer Wire: N/A
Radio Antenna Trigger Wire: N/A
Radio Amplifier Trigger Wire: N/A
Front Speakers Size: 5′ x 7′
Front Speakers Location: Doors
Left Front Speaker Wire (+): Orange/Light Green
Left Front Speaker Wire (-): Light Blue/White
Right Front Speaker Wire (+): White/Light Green
Right Front Speaker Wire (-): Dark Green/Orange
Rear Speakers Size: 5′ x 7′
Rear Speakers Location: Side Panels
Left Rear Speaker Wire (+): Light Brown/White
Left Rear Speaker Wire (-): Light Brown/Yellow
Right Rear Speaker Wire (+): Light Brown/Green
Right Rear Speaker Wire (-): Brown/Pink
That's what they show for factory
Posted on May 31, 2009
BLACK MAY BE YOUR GROUND AND THE OTHER WILL BE HOT DEPENDING ON WHAT MOVEMENT YOU ARE DOING ON SWITCH YOU CAN TAKE TEST LIGHT AND SEE WITCH ONE LIGHT UP WHEN YOU PUSH THE SWITCH THAT MAY TELL YOU IF YOU HAVE SWITCH ISUSE OR MOTOR ISUSE TEST LIGHT YOU CAN BUY CHEAP OR IF YOU MAVE TEST METER THIS CAN WORK TO HOPE THIS HELPS
Posted on Sep 12, 2009
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