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1980 tilt&trim help

K

krjackson

New member
I have a 1980 V4 85 horse with tilt and trim.I have checked all of the wiring from the switch to the black box and the wires going to the tilt and trim motor.I am using a test light to check and see if I have power to the tilt and trim motor.When I push the switch to the down position I am showing power going to the motor and in the up position I get the same results.There are 3 wires going to the motor a green a blue and a black.When I check these wires my test light shows power to all 3 but only when I push to up or down switch.I think that this is normal but I am not sure.I don't know if the black wire should show power,I thought that black was for ground.If anybody can give me any help I would greatly appreciate it.
Thank You
 
The test light just doesn't do the job... use a voltmeter to see what actual voltage you're getting.

Voltmeter black lead to negative post of battery... Red meter lead to the Green, then the Blue when you engage the switch up or down.

P-TILTWIRING.jpg
 
My PTT is a 76/85 Hp.
I had to open the valve on the side of the motor and let the air out, refill the system. Then it worked just fine.
To test mine, I disconnected the Connector from the TT system to the rest of the boat.
I used jumper wires to make the Up n' Down motor work.
If you get that to happen, you know your problem is up front somewhere.

I seem to have lost the photos. Somebody on this forum had the Photos of the Screw to let the air out. I got it here.
 
Last edited:
joereeves said:
The test light just doesn't do the job... use a voltmeter to see what actual voltage you're getting.

Voltmeter black lead to negative post of battery... Red meter lead to the Green, then the Blue when you engage the switch up or down.

P-TILTWIRING.jpg
Click to expand...
This is great I'll give this a try and see what happens.Should the black wire going to the motor be the ground?
 
Thanks for the reply I think that I am getting power to the motor,but I need to test using a volt meter instead of a test light.I will try and see if there is air in the system.I am trying to figure out how to jump the wires to the motor and make it work,but so far no luck.I'll try your ideas and see if they might work.Thank You.
 
joereeves said:
The test light just doesn't do the job... use a voltmeter to see what actual voltage you're getting.

Voltmeter black lead to negative post of battery... Red meter lead to the Green, then the Blue when you engage the switch up or down.

P-TILTWIRING.jpg
Click to expand...
This is great I'll give this a try and see what happens.Should the black wire going to the motor be the ground?
 
I am going to try what you said to do.When I was using the test light I was getting power from the black wire and I don't think that is right? I'll give this a shot and reply back with the results.Thank You
 
I just wanted to post an update on what I have done.I hooked a wire to the green terminal and a wire to the black wire,after I UN plugged the connecter from the black box that all the rest of the wires hook into.So it went straight to the motor and I grounded the black wire to the battery and the green wire to the positive and the motor worked.So I don't think that it is the motor but something else.Does anybody have any ideas what I should check next,I'm kinda lost.
 
The PTT diagram I inserted is about as simple and explanatory as I can get. I suggest that you find a friend that is knowledgeable of the 12v circuit setup and show him that diagram.
 
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