[Poundy]

My Aux fans have never worked not even on low A/C on a hot day below 25mph. So this will become my next project, the fans run if I bridge the wires on the green sensor at the drier. I have a feeling it may be the K9 relay.

My question is as seen on my B10/8 sensor the plug deteriorated through heat over the years. I have since wired better connectors on to the wires, but on doing a search I came across this picture posted by Ray (I think) that shows a B10/8 with a more vertical connector that is wired with a resistor to it. I cannot remember seeing any evidence of one on my old plug. Does anyone know if it is a later update or do any 1992 owners have it fitted and if so what it's purpose is?

Thanks
Norman

 

[Poundy]

Ah! I believe that is an addition when doing the K6JRF mod, which I won't be doing.
So the new question is should I be getting any readings off the 2 wires going on to the Blue 2 pin sensor. I pulled them off and bridged them, expecting the fans to come on but nothing.
I am thinking they may go back to the K9 relay and then to the aux fans for low speed. Any Ideas?

 

[Pete S]

Well Poundy I don't have a 92 but it is not there on my 96.

 

[Poundy]

I think I just need to know what readings I should be getting on the wires of the Blue B10/8 coolant sensor if any.

 

[Pete S]

I can get you the readings you want you just have to tell me which and how I would go about getting them. I do have a multimeter but like I said I need a detailed run through.

 

[Poundy]

I can get you the readings you want you just have to tell me which and how I would go about getting them. I do have a multimeter but like I said I need a detailed run through.

That's why I posted, I have a mm but don't know what or how hopefully someone will. But I appreciate your offer of help :thumbsup:

 

[Poundy]

Anyone?

 

[lowesguy]

On my 91w124 had a bad coolant sensor that talks to the fans,if its bad fans don't work,just a thought,luckily it was like $26,fans work now,think the test was if you pull the electrical connector at sensor,fans come on. the resister add on is so fans start at lower coolant temps.

 

[lowesguy]

Another tip! my connector was toast,so I found a trailer plug ,had 3 female inputs,I shaved one off ,and it fit perfectly! a little solder and heat shrink,good to go!

 

[feedingtherat]

poundy, I can check but not until mon/tues next week.

 

[Poundy]

poundy, I can check but not until mon/tues next week.

Thanks :thumbsup:

 

[feedingtherat]

just fyi at an ambient temp of 28 degrees c the b10/8 sensor read 4.7k ohms. the disconnected wires from the sensor read 1.3k ohm with ign off, engine off. I just realised I should have reversed polarity the test leads to see if the reading changes - i'll do it tomorrow.

btw it seems that one side of b10/8 (#2 grey violet) goes to the a/c push button control module and the other side (#1 brown yellow green) seems to be a common ground connect for most of the a/c and cooling/heating related sensors. this info from star classic.

 

[Poundy]

just fyi at an ambient temp of 28 degrees c the b10/8 sensor read 4.7k ohms. the disconnected wires from the sensor read 1.3k ohm with ign off, engine off. I just realised I should have reversed polarity the test leads to see if the reading changes - i'll do it tomorrow.

btw it seems that one side of b10/8 (#2 grey violet) goes to the a/c push button control module and the other side (#1 brown yellow green) seems to be a common ground connect for most of the a/c and cooling/heating related sensors. this info from star classic.

Thanks for the info, hopefully the more I know the easier it should be I ordered a K9 the 2 temp sensors 4 & 2 pin and the big resistor below the head light. I have tested the fans and they work ok. I will install 1 thing at a time and hopefully find the one that is the problem, just hope it doesn't come down to the controller.