88 k75c fan testing/questions

[Arredondo1]

Now that the k75 is up and running, its time to get the fan working correctly. First I jumped the fan connection and the fan works. Did the 15 minute test, fan did not turn on. Then i took out the fan relay and jumped pins as suggested in other posts. I tried the same thing on the k100 and nothing of this sort happened. However this time with the k75 I blew fuses with every test. I turned on the bike and grounded pin E. Saw a spark at the pin and I blew the 2nd fuse counting from the bottom up. Then I jumped the 15 and a2 pins together, it sparked again at the pins(on the a2 side i think) and I blew the bottom fuse. I was unable to see if the fan moved at all either time. Now before I start sacrificing fuses left and right. What should happen with these tests? Is there supposed to be a spark and is the fuse supposed to blow out with these tests? Does it take a second or should the fan start spinning immediately? Or is the wiring messed up on the bike.

[Laitch]

First I jumped the fan connection and the fan works. Did the 15 minute test, fan did not turn on. Then i took out the fan relay and jumped pins as suggested in other posts.

Please link to the post that has the test you used, Arredondo1.

[Arredondo1]

Please link to the post that has the test you used, Arredondo1.

http://www.motobrick.com/index.php/topic,6702.0.html

[Laitch]

I tried the same thing on the k100 and nothing of this sort happened.
Now before I start sacrificing fuses left and right. What should happen with these tests? Is there supposed to be a spark and is the fuse supposed to blow out with these tests? Or is the wiring messed up on the bike.

A couple of things.

First, go back to your thread about the clutch cable and explain what you were doing incorrectly and what you did to finally get it to work. That way the thread will be of use to readers.

Second, if you performed this same test on the K100 without a problem then it should work similarly on the K75. If the fan is seized, a fuse will be likely to blow. You need to look closely at how you are performing these tests. There should be no sparks lighting up the night and the fan should start if it isn't seized or its motor failed.

Fuses are relatively cheap. Save up and get some more of them. Your wiring might be messed up. Did you or somebody else do some wiring?

[rbm]

Did you pull the temperature relay to perform your tests or have you left it in place?  Are you certain about the pins you are jumping?  The pin designations will be different looking from the top of the socket versus looking at them from the bottom, so you should make sure that any diagram you are following tells you whether the view is from top or bottom.  Double check your assumptions by testing for voltage or testing for continuity to ground before jumping.  Validate wire colour coding is another way to make sure you are not making a mistake.

[Arredondo1]

Laitch, will do about the other post.
And I picked up the k75 in pretty bad shape. But a lot of the wiring seems to be intact, I have not done any work on the wiring. Who knows what the previous owners did to it.


As far as the k100 i wired a manual switch and it works for now. But i would like to get it running correctly, same with the k75.


Rbm, Ill post pics of what I am looking at tomorrow. The post says take off the relay to avoid damaging it, so I took it off. I'll test the voltages tomorrow.


 

[Arredondo1]

Ok here is what I am working with.



Is the wiring correct?



E green/purple
A2 purple/yellow
15 green/brown, 2 wires
31 brown, 2 wires
A3 purple/black
9 white/green


I pulled the plug as far out as i could to look at the backside and there is a splice exposing A2, the purple/yellow wire. I wonder what one of the previous owners was attempting with this splice.


The two yellow fan connections connect to a purple/yellow and brown connector.

[Laitch]

Is the wiring correct?
E green/purple
A2 purple/yellow
15 green/brown, 2 wires
31 brown, 2 wires
A3 purple/black
9 white/green

there is a splice exposing A2, the purple/yellow wire. I wonder what one of the previous owners was attempting with this splice.
The two yellow fan connections connect to a purple/yellow and brown connector.

The eight wires on the list are correct.

If you want to know what might have been attempted with the A2 splice, look on the diagram at the link you supplied in Reply#2. In the meantime, tape up that splice neatly.
The fan's wires should be the same color as the connector's wires receiving them so it seems there might have been some work done there.

You wrote rbm yesterday that you'd "test voltages" today. Did you do any testing today? Did more fuses blow? Did you burn up the bike? Are you ok?

[Arredondo1]

Didnt get a chance to test the voltages/continuity, will do so when i return. I didnt blow myself up though haha