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Re: 1991 ford 4 cyc starter relay.
The part may not look like this but similar,no negative cables are to be connected to this.Positive to left side of solenoid,nearest the battery,and all smallar wires that will fit on the post.One cable on the right side of solenoid goes to the starter.Any other questons please ask,I will try to help,if this helps,please let us know thanks.
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Make sure battery has a full charge. Did you check primary voltage to ignition coil, engine cranking, dark green wire with orange tracer? Use a test light, is it hot? The voltage comes from asd relay, check voltage and ground circuits. The load side of relay is that line with arrowhead, that circuit is fuse protected and hot all the time. The control side of relay is the left side in diagram, has to have voltage and ground. The voltage appears to come from ignition switch on or cranking. Grounded by computer.
The distributor has a sensor in it that sends rpm signal to computer, w/o that signal the computer won't ground the asd relay and you get nothing. The asd relay sends voltage to several systems. Just my opinion. Any applicable trouble codes?
The computer controls the injection of the fuel. If you look at the wiring diagram you will note the bottom 4 pins that are the negative and positive to the left and right injection. Atleast on my 1991 it is .Could be the ecm or computer is sending a false signal or not sending one at all. A sign of this is the fuel pump in the gas tank can be heard and will continue to run as if pressure in the fuel system is not building. Tthe truck want crank as if no fuel. When starter fluid is injected into the Throttle body the egine will start and run untill fluid is used up. It will keep running as long as fluid is added.
1. Disconnect the negative battery cable
2. V-8 or V-6 are both located on the passenger side, remove two or three bolts holding the starter on the transmission
3. Drop the starter through the opening between the firewall and the exhaust
4. Unbolt the battery cable from the starter, and disconnect any other wires.
The starter relay is mounted on the starter. To replace you must remove the starter motor which is on the front side of the engine at the transmission bell housing. Make sure you disconnect the battery negative cable before you start work. Mark all starter wires and where they go on the different starter posts.
NO , USE A 10 MM SWIVEL SOCKET FOR THE BOTTOM AND SIDE BOLT ,,USE 10 SOCKET AND 4'' EXTENSION TO REMOVE TOP BOLT USE 8MM SOCKET TO REMOVE SWITCH WIRE AND 13 MM TO REMOVENUT ON BATTERY CABLE TERMINAL OF STARTER
DONT FORGET TO REMOVE THE NEGATIVE BATTERY CABLE FIRST
1991 Ford F150 Truck Car Stereo Wiring Schematic
Car Radio Battery Constant 12v+ Wire: Green/Yellow
Car Radio Accessory Switched 12v+ Wire: Yellow/Black
Car Radio Ground Wire: Red or Black
Car Radio Illumination Wire: Blue/Red
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: N/A
Car Audio Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Orange/Green
Left Front Speaker Negative Wire (-): Black/White
Right Front Speaker Positive Wire (+): White/Green
Right Front Speaker Negative Wire (-): Black/White
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Pink/Green
Left Rear Speaker Negative Wire (-): Pink/Blue
Right Rear Speaker Positive Wire (+): Pink/Blue
Right Rear Speaker Negative Wire (-): Green/Orange
This should help you with more then just the constant power wire, good luck.
Ford does not put the solenoid on the starter itself, so then it is just a relay, usually on a fender. It will have 4 wires. Two thick ones from the battery and to the starter. And 2 thin ones from ignition switch and to ground.
here is the radio's wire color diagram, u should be able to fix the problem with this info.Fuse box is on drivers side under the dash. 1991 Ford Tempo Car Radio Wiring Guide
Car Radio Battery Constant 12v+ Wire: Green/Yellow Car Radio Accessory Switched 12v+ Wire: Yellow/Black Car Radio Ground Wire: Red or Black Car Radio Illumination Wire: N/A Car Stereo Dimmer Wire: N/A Car Stereo Antenna Trigger Wire: N/A Car Stereo Amp Trigger Wire: N/A Car Stereo Amplifier Location: N/A Car Audio Front Speakers Size: 6 1/2′ Car Audio Front Speakers Location: Doors Left Front Speaker Positive Wire (+): Orange/Green Left Front Speaker Negative Wire (-): Black/White Right Front Speaker Positive Wire (+): White/Green Right Front Speaker Negative Wire (-): Black/White Car Audio Rear Speakers Size: 5′ x 7′ Car Audio Rear Speakers Location: Rear Deck Left Rear Speaker Positive Wire (+): Pink/Green Left Rear Speaker Negative Wire (-): Pink/Blue Right Rear Speaker Positive Wire (+): Pink/Blue Right Rear Speaker Negative Wire (-): Green/Orange