20 Most Recent 1990 Ford Thunderbird - Page 4 Questions & Answers

Hi, Replace the relay. and replace the Thermostat in the upper rad hose..Good luck.

probably best bet is to go to a junk yard and find a used one.

It just clicks, this indicates problem with battery or problem with starter.If starter is faulty then battery will just give power to starter and click.The engine will not start due to faulty starter.Most likely starter is faulty, but if both battery and starter checked out ok then there are other possibilities too.Click the link below:-- http://technoanswers.blogspot.com/2011/06/1990-thunderbird-sc-when-you-turn-key.html----------------- This should help.Thanks.Helpmech.

Turn key to on position engine off then push gas pedal to the floor 3 times

You need to get the car to a place that has diagnostic equipment so the problem can be pinpointed or you will be throwing a lot of money on peoples guesses. There are too many things that can cause this to try and give you an excact answer. The problem probably lies in the fuel control system and it is getting bad readings from a sensor, but which one I can't tell. The check engine light means it is storing a code that Auto zone can pull for you if you don't want to take it to a shop, but they can misread codes sometimes!

i think these were still cable operated speedometers during this year.you would check them the same way you would check any gm car unless you haven`t been in the trade that long.find the speedo cable were it hooks up to the speedo head and release it and pull it down where you can get to it.spin the cable by hand to see if it spins freely and not tight or binding if so pull it out of the outer cable and visually inspect it.before re-installing lube the cable with the drive wheels off the ground have someone spin the wheels and watch the cable to see if it spins.if not then you will have to pull the speedo drive out of the transmission to inspect the drive and driven gears for damage to the teeth.if you find damage then replace components.they go by color of the gear and the number of teeth when ordering part.if the gears are good then check the drive gear in the tranny to see if it turns if it does then the problem is probably the speedo head.some where cable/electric operated.if the cable is good then check the electrical connection at the transmission.the electrical portion does seize up and need replacing.there is also a speedo transducer in the back of the instrument cluster that can go bad,this is only if its not cable operated.

Check with a few repair shops, that have ALLDATA
or similar data base,and have them print just the
diagrams you need

Take is to a interstate battery place and get it checked out. You can damage a good alternator that way.

What about and instrument fuse that is probably located in the fuse panel? I would check there first.

I don't have a pix. but, check behind the glove box or under the right side if the dash.

becareful not to break the plastice clips on the glove box.

faulty thermostat

THE BIG MAIN POSITIVE CABLE GOES ON EITHER OF THE BIG TERMINALS, ALL OF THE OTHERS THAT FIT ARE FOR THE OTHER BIG TERMINAL ON THE RELAY

You'll have to replace it, the diaphram is broke on the inside.

There is a starter solenoid on the starter and another one on the firewall or inner fender.Follow the positive cable from the battery to the solenoid.Remove any covers that may be hiding it.Now,with the car in park or neutral and the park break set on you should be able to get it to crank by crossing the two large copper posts with a screw driver.If it cranks over now then you need to check for power to the small post with the black an red wire going to it.If you have power with the key in the start position then you need to replace that solenoid.If the is no power in that wire then you could either need a neutral safety switch or an ignition switch.If nothing happened when you crossed the posts on the solenoid then you either need a starter,the cables need to be cleaned or replaced,the nut on the starter solenoid could have loosened off,the small wire on the starter solenoid may have a bad connection or your battery does not have enough amperage in it to turn over the engine.Hope this helps.

4.5 quarts with filter change. Run engine until it warms a bit and the oil pressure indicates a readout. Let it set a while and recheck the level .

If it over heated, could have bad head gasket's, fill radiator with water, crank engine with radiator cap off, if water is push out of radiator while cranking, bad head gaskets', also remove spark plug's, crank engine if any water, bad head gasket, also when spark plug's removed, check for any water on them.If there is any water on plug's, bad head gasket, also could try doing a cylinder compression test, if bad compression, head gasket, no compression, wont start that way.

REMOVAL AND INSTALLATION Upper ball joints are not replaceable. The upper ball joint is part of the upper control arm bushing joint and is not serviced separately. If the upper ball joints are found to be defective, the entire upper control arm bushing joint assembly must be replaced. Lower Ball Joint INSPECTION

1. Support the vehicle in normal driving position with ball joints loaded.
2. Wipe the grease fitting and checking surface, so they are free of dirt and grease. The checking surface is the round boss into which the grease fitting is threaded.
3. The checking surface should project outside the cover. If the checking surface is inside the cover, replace the lower arm assembly.