Question about 1989 Ford Tempo

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Can you just change the wiring harness that plugs into the top of the alternator. There is 3 connectors and the plastic around the top have melted which then results in my car just running off the battery..HELP

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Yes, just pickup at parts store or recycle yard for same application, with same color wires in same order, with same type connection. Disconnect battery before doing anything. Cut wires one at a time just in case, and take it with you. Re-connect with solder or **** connectors and shrink tube all connections. Call ahead to parts store just so your not left hanging, but if worse comes to worse, put it back on until new one arrives.

Posted on Jan 09, 2009


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I need a wiring diagram for an after market alternator going into a 1989 ford e-150. There is no harness block on alternator, only bolts with nuts, although the case is correct in all other respects.

if you have a connector block in the vehicle harness that simply plugged into the alternator , you can get an auto electrician to make up a harness adaptor that screws on to the bolts and plugs into the harness
or if you don't wish to maintain simplicity for another alternator change cut the harness connector off and fit the wires directly to the alternator after talking to an auto electrician to find out what wires go where
really best have him do the job and he can then check to see if the after market alternator you got is internally regulated or externally regulated as they are different and will cause problems if not suitable

Nov 23, 2016 | Ford E-150 Cars & Trucks


How To Replace A Blower Motor In A 2005 Chevy Trailblazer

Under the passenger side of the dashboard, remove the three 7mm bolts holding the lower plastic cover from the dashboard. Drop down the plastic cover and you will see a square box and 2 or 3 plugs holding to the cover. Unbolt the control box mounted to that cover and the 3 harnesses of wires attached to it, and move them up and out of the way. Look up towards the front corner, the motor is bolted up into the heater box. There are 3 small metric bolts, 4.5mm, I believe, remove those bolts, disconnect the electrical connection to the motor and remove motor. Check the motor electrical connector for any burnt over overheated wires. Alot of these trucks' original connector plug had too small of wiring, causing the power wire to get hot and melt the wire insulation and the plug it's self. The 7 wire plug from the Chevy Dealership is $67.00. You'll need to cut off the old plug and use the connectors supplied with the new plug to replace the old plug. I have seen the blower motor cut off going over a bump, and then come back on after hitting another bump, due to the fact that the individual connector gets hot and melts into the plug. You may also want to look at the blower motor resistor which is mounted right next to the blower motor, sometimes the blower motor resistor will go out altogether, not powering the blower motor, or not allowing the motor to run at a selected speed.

on Mar 09, 2010 | Chevrolet TrailBlazer Cars & Trucks

1 Answer

Well our 2003 ford focus wagon when you start the car the battery light comes on and its not charging but if you hit the accelerator the light brightens and it starts charging and light stays on i've put a...

This sounds like a bad activating circuit. The ignition switch is suppose to send juice to the Alternator. Also the plastic plug connectors holding the small wires into the Alternator can ride up and miss the metal tabs they are suppose to fit on. Mechanics often pull the metal connectors out of the plastic connector, then slide the metal connectors onto the Regulator tabs inside the Alternator opening. The Mechanics slide the plastic connector housing over the already attached metal connectors and call it a day.

Aug 20, 2014 | 2003 Ford Focus

1 Answer

Alternator current is not reaching the battery

be looking at fuseable links in the wiring and connectors also.. I just had this issue myself..mine was a bad connection on the alternator..which is unfortunately locaded low near the passenger front tire.. it always gets wet during rain or melting snow/ice car is a 91 and its missing all the plastic splash guards under the front..I took the alternator off and got it tested was fine.. my wiring harness has 4 connectors made into a loom that fits on the back of the of these was all rusted and I wire brushed it and coated it with waterproof grease.. it works just fine now..the fuseable links are wires made into the harness that will burn apart instead of the entire set burning up..and destroying the car..these links will feel wierd if the are bad..and will bend very easily when they are warm.. if one is burnt through it will wigghle easily also..

Dec 15, 2013 | 2005 Hyundai Elantra

1 Answer

Is the wiring going to multi function switch part of main harness or can I change it somehow.

Part of the main harness. Once the wires leave the multi-function's harness connector, the wires go everywhere.
So the wires are pulling out backward out of the plastic connector? There is a feature on the wire terminals to keep them in place on a connector and not let them slip back out. A tiny little metal clip on top of the wire terminal is raised just enough that when the terminal is inserted into the plastic plug, the clip will ride over a bump in the plastic, then be raised enough that when pulling on the wire from the back, the clip will prevent wire from being pulled out. Look at the loose wires and find that little metal clip (on the top of the terminal pin), bend it up and try re-inserting the wire into the plastic connector. When it slides in and locks in place, and will not come back out, you have done it right.. I hope I understood you right, and this is helpful. Good luck.

Dec 03, 2012 | Cars & Trucks

1 Answer

Alternater change belt release

Hi and Welcome to Fixya

Here's how to replace the belt.

Disconnect the battery ground cable and lay it aside, ensuring that it does not touch metal. Unplug the wiring harness connector on the back of the alternator if so equipped. If you can't pry the plug tangs open with your fingers, use a screwdriver.
Remove the nuts on the back of the alternator with a wrench then pull the wires off the studs. Loosen the accessory drive belt tensioner with a socket, by pushing the tensioner towards the engine. Lift the belt off the pulleys.
Unbolt the alternator mounting bolts with the appropriate socket then remove the alternator.
Fit the new alternator onto its bracket then insert the mounting bolts. Tighten the right bolt to 18 foot-pounds of torque then tighten the left bolt to 37 foot-pounds of torque. Route the accessory drive belt around the pulleys, except for the tensioner pulley. The drive belt routing diagram is located on the fan shroud or the inside of the hood. Push the tensioner towards the engine. Slide the belt on the tensioner then release the tensioner.
Plug in the wiring harness connector if so equipped. Slide the wires onto the proper terminals on the back of the alternator. Tighten the battery feed wire nut to 71 inch-pounds of torque. Reinstall the negative battery cable.

Have a good one!

Jan 09, 2011 | 1993 Chevrolet Suburban

1 Answer

2001 ford f250 7.3L dealer says couple of plastic connectors crumbling and needs replacing. He said he cant get just the plastic connectors and wants to replace the engine wire harness for 1800.00. Where...

I can tell you one thing,and I've been at this 46 years, Iam not paying $1800 to replace a perfectly good wire harness.
Discribe in detail what you need done, and I will come up with something for you.
If they are referring to melted harness connectors,they are avail or you get them off a salvage vehicle.
Also there are tools to remake your terminal ends.
The dealer is not a custom repair shop,their parts switchers.

May 10, 2010 | 2002 Ford F250 Super Duty SuperCab

1 Answer

Battery not charging, new alternator, checked connections, checked fuses, alternator harness was melted at the end where it plugs into the main harness

A melted plug typically means a loose connection. Maybe one of the pins in the connector got loose and the poor connection created heat. If there are only a couple of wires to the plug and harness I would cut out the plugs and use good solderless connectors to repair. I wil be a lot less expensive than a new harness. If it is just damage to the plug going to the alt you can get replacements for them.

Oct 10, 2009 | 1990 Ford LTD Crown Victoria

1 Answer

When i went to change my headlamp bulb in my renault clio there was a loose wire in the small black connector box in the back what is this called and can i buy a new one.thanks

your headlight harness... You can by them, but the dealership will charge you probably around $70-80 for it. Alternatively, you can just plug the wire back into the harness and solder it back in

Sep 16, 2009 | 2000 Renault 181

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