Question about 1990 Ford F150

2 Answers

I have a 1990 f150 lariat my alternator wont keep my truck running I replaced the alternator today along with alternator harness. I got the alternator tested and its good, the battery is good, and soliniod was purchased along with the alternator, all wires are correctly connected as well. I remove the negative battery cable and my truck dies I checked all fuses and all were in proper working order. Why wont my alterantor charge my battery?

Posted by on

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Ford Master
  • 11,086 Answers

You don't remove battery cable while the vehicle is running , use a volt meter at the battery . Red lead to positive post an black to negative post. Test voltage 12.6 not running 13 to 15 volts engine running .
http://www.troubleshooters.com/dont_disconnect_battery.htm

Posted on Jun 29, 2017

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Ford Master
  • 3,245 Answers

Https://s11.postimg.org/crrcun103/generator.jpg

Click on the link.
The diagram shows generator with internal voltage regulator and with external voltage regulator, at the moment, I don't know which one you have?
The bat terminal at the generator should be hot even with the key off, is it, use a test light. If no voltage either the fusible link is faulty or the wiring circuit to battery +. You can see fusible links in diagram.
Could be other issues, the generator probably needs excite voltage or it won't work. The excite voltage comes from charge indicator circuit. Does the charge lamp on the dash work?

Posted on Jun 29, 2017

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

ManiacZack
  • 14 Answers

SOURCE: location of alternator 1986 ford f150 xlt lariat

Well first have you charged your battery back up, if so then try to by pass the ingintion switch by just connecting the two main post of the colenoid with a piece or wire, this creates a direct wire basically from your battery to your starter, if still no luck you will need a new starter located more to the drivers side close to right under the pedels on the bottom side of the truck.

Posted on Oct 06, 2008

  • 39 Answers

SOURCE: 1990 f150 wont shift from 1st to 2nd

Well where to start. First of all you listed that the transmission won't shift from 1st to 2nd gear. This could be any number of things from internal oil leaks, bad sensors, valves, clutches and so on and so on. The problem is there is no way of telling you this is the problem or that is the problem with out performing tests such as taking pressure readings, stall tests and so on. Then we get to your description, having gears slam can also be caused by all the items listed above with the first issue. Losing all gears completely (I assume drive, overdrive, reverse, etc.) leads me to believe you have a major internal leak (assuming there isn't oil pouring onto the ground), a issue with the transmission pump or torque converter. Again there isn't anything you can do without taking pressure readings. And even with those readings you won't really know what your looking for without a complete understanding of how a automatic transmission works. Sorry I couldn't give you a straight forward easy answer. I would recommend taking your truck (assuming it will drive) to a shop that specializes in transmissions. I recommend a transmission shop because to me dealership labor rates are to high, and secondly I wouldn't take it to a general independent shop because you don't know if it will be an experienced transmission technician working on it or a "grease monkey" who will sell you things it dosen't need because he's just guessing what wrong with it.

Posted on Mar 26, 2009

  • 13 Answers

SOURCE: alternator not holding charge

you need to check your grounds... very good possiblity there is a bad ground.

Posted on Apr 10, 2009

dcgun007
  • 63 Answers

SOURCE: how to replace a thermostat on a 1990 Ford F150 xl

CAUTION
If the radiator is filled to the top with coolant and the engine is run without the radiator cap in place, the coolant will expand and spill over as the engine warms up.

  • Drain some coolant into a clean container until the coolant level is below the thermostat housing.
  • Remove the upper radiator hose connection from the thermostat housing.
  • Loosen the housing bolts and remove the housing.
  • Remove the gasket and scrape it carefully from the surface of the housing and the mounting surface on the engine. If the gasket remains on either of the surfaces, there will probably bea coolant leak after reassembly. Some engines use a rubber O-ring to seal a thermostat housing.
  • Compare the size of the thermostat to the old one. They are of different sizes, types, and temperature ratings.
  • The temperature rating is stamped on the sensing bulb on the bottom of the thermostat. The temperature bulb faces the block.
  • When replacing a thermostat, be sure that the thermostat fits into the groove in the block or outlet housing. If the thermostat is installed upside down, the engine will overheat.
  • Install the gasket.
  • Reinstall the thermostat housing. Refill the system and run the engine or pressure test to check for leaks.
  • When the engine has reached operating temperature make sure the thermostat opens.
  • You should be able to see coolant circulating within the radiator.
  • Another way of checking thermostat operation is to feel the top of the radiator hose or use a thermometer or multimeter with a temperature probe to confirm that the coolant is warming up.
  • If the engine is overheating, but the top hose is still cool to the touch, the thermostat is stuck closed and must be replaced.
NOTE When a paper gasket is used and the recess is in the thermostat housing, it is a good practice to position the thermostat into the recess and glue the gasket to hold it in place. If it falls out of its groove during installation, the outlet housing can be cracked or a coolant leak will result. Before tightening the water outlet housing, try to rock it back and forth to be sure it is flush. Housings are often cracked during this step. let me know if you need more...dc

Posted on Jun 24, 2009

REDOIL
  • 355 Answers

SOURCE: Changed out Many parts and still truck is DEAD!

DOSE THE TRUCK TRUN OVER IF SO CHECK FOR SPARK IF NO SPARK IT COULD BE EGNITION MODULE I NEED TO KNOW IF IT TRUNS OVER

Posted on Sep 18, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

Runs but only when applying pressure to the steering wheel


sound like loose wires to the ignition switch in the steering column. just remove steering column shroud and lower the steering column check the ignition switch wires.first disconnect negative battery cable before working on ignition switch. either switch wires loosen or switch could be bad.

Jul 29, 2013 | 1990 Ford F150

2 Answers

1990 f150 xlt lariat 4x4 how do i delete my aux fuel tank. can i just plug the lines


Drain aux tank, remove/bypass switchover valve and run hose from main tank to line from switch valve forward.

Feb 26, 2011 | 1990 Ford F150

2 Answers

Ford F150 engine backfiring, running/idling rough


I Have a 1999 ford f150 4.6 that back fires and is just running really ruff when idling alot of nack fire a sord of like a pulse going on what is my problem?

Apr 16, 2010 | Ford F-150 Cars & Trucks

2 Answers

If you turn the key to acc, nothing happens, if you turn it to on, nothing happens, but if you turn it all the way to start, it does star but when the key springs back like normal, it turns the truck off....


did you replace the switch or did you replace the ingnition cylinder (cylinder is the part the key goes in)the switch is what controls the start acc and keeps the car or truck running

Jan 02, 2010 | 1990 Ford F150

1 Answer

My car uses to much fuel. 2,6 liter on 10 km.help


sounds like you need a ring job on those pistons. you are having a lot of blow by. make sure you have the bores honed before you rering them

Jan 16, 2009 | 1990 Ford F150

1 Answer

It uses too much fuel. 2,6 liter per 10 km.


You need to replace the sensors,,Throttle PositioningSensor, OXYGEN sensors, Mass Air Flow. after which your truck will run nicer and use less fuel.

Jan 16, 2009 | 1990 Ford F150

2 Answers

Charging unit


need the engine and whether its internal or external regulator and your fax or email

Dec 02, 2008 | 1990 Ford F250

Not finding what you are looking for?
1990 Ford F150 Logo

Related Topics:

46 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

75117 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

fordexpert

Level 3 Expert

5474 Answers

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...