I changed my wiper motor on my 1989 f150 but the wipers still dont work what is the problem

Did you check the fuse? Have power at the plug? could be a bad ground.

check grounds first.

On a car over 15 years old the odds are the wiper motor failed

You need wiring diagrams to work on electrical

You have to see what is in the circuit you need resolved

No one can tell you how to diagnose things,you follow a
procedure that work for you

Don't change any parts

That is not how you work on a car
Learn how things work & test to confirm failure

Your not going to have relay failures as you read about
on these sites,too much bad info talked up on here

A fuse will blow if the motor or any motor fails,so that could be
a key do not replace a fuse,go to what it controls such a the motor
& try unpluging it & use the wiring diagrams to put power to it

Hi guys I have a 09 f150 I replaced the combination switch for the wiper system and the wiper motor and I'm not getting any wipers. Checked all the grounds and fuses and can't find an issue can anyone please help?

the 89 may have a wiper control module that needs to be replaced... how many wires connect to the wiper motor? if more than two the module is built in. if only two then the module is re,ote mounted and probally under the drivers side dashboard

sounds like a loose nut. there are nuts that hold the wiper arms on, they may be under a cover but theyre at the base of the wiper arm. also there's a nut that holds the wiper linkage onto the wiper motor. if you can move the wipers independently, it's the nuts connecting the wiper arms.if you move one arm and the other moves with it, it's the nut holding the linkage to the motor.

The wiper motor is burned out or the commutator in the motor is worn,

With the wiper switch in the OFF position, manually grab both wiper arms and move the wipers from their "parked" position.
Now turn wiper switch ON.

They may work from now on; if not, then the wiper motor needs replacement.

By the way, was the fuse blown?? (It won't change the answer).

Hope this helps...

take it back loose and move it 180 degrees

probably the nylon gear inside the wiper motor broke. Some are serviceable, some are not. If you want a used one go to car-part.com and look on page with asterisk for lowest cost.
For new gear (If serviceable) call tascafordparts.com for a discounted part.

Look into the cowl grille at the base of the windshield and watch to see if the linkages are moving back and forth. If not, it is the motor or gear inside the motor.

please rate highly if htis helps.

Sounds like the wiper blade motor is going bad. You can also try to use some alpurpose oil on it