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As for the heat wave, there certainly is one. But it has been hot enough around here to be using the A/C for a few months. In Cashman's case he had been troubleshooting the problem for some time and had tried a workaround or two. But his SO suggested it was time to get some help.
I had never played with the switches on that control so was blown away with how small they are in comparison to the load they have to carry - especially for the blower motor. So, I'm not at all surprised we are seeing them fail. Yet another reason I'm going to use it to control a relay on Dad's truck.
Don't shoot me but I got to ask?
The blower motor does not work right?
He put 12v to the motor and it works so motor is good right?
He traced it back to the blower motor on/off switch by jumping wires removing the switch from the picture right?
So he needs a blower motor switch? This is the switch on the other side from the duel tank switch in this control panel right?
So he bought the vacuum part of the control with out switches from ebay if I saw the ebay picture right.
OR
am I way off here and if so it goes to show you if it anit one thing it's another, never mind!
Dave ----
By jumping power to the motor you are still using the resistors and switch opposite the gas tank switch. So that all works. The problem seems to be the switch on the vacuum lever is not supplying power to the motor.
I am just thankful I could buy a NOS switch, instead of a pull from a junkyard. Not sure that switch is used on much newer trucks. Yes it is pricey. A project is to put the blower motor on a relay as Gary suggested, as I did with headlights.
I am just thankful I could buy a NOS switch, instead of a pull from a junkyard. Not sure that switch is used on much newer trucks. Yes it is pricey. A project is to put the blower motor on a relay as Gary suggested, as I did with headlights.
Great go and give me something else I should do to my project
Dave ----
Just depends on whether you want to have problems with it later. And, that may be at a point when NOS parts are either not available or are more 'spensive than even now.
That column is for the Motorcraft service part number.
...
Well, it showed up today, and I got ready to install it, and it is different. Maybe still works, but not a direct fit. It has 3 terminals instead of 4 as the original did. That said, on the original, there were two brown/white which were both +12V, and the orange/brown to blower and I can't remember other color. So maybe it works just sending both brown/white to one terminal. I will use ohmeter to figure out switch so see if that would work.
I agree with Jim - right box but wrong part. And, that's becoming the case more often as we get to the bottom of the bin on parts. Someone probably pulled that part and started to install it, only to find it didn't fit. So, back on the shelf it went. And again, and again. Always the bridesmaid and never the bride.
Just an update to the problem. Ebay seller refunded money, picked up another (more expensive yet) on Ebay, but it was correct part, NOS. Installed it and it ran for about 15 minutes and stopped. Got a chance to look into it this AM and 30 amp fuse was blown. I know I was switching fan speed about that time it quit. Anyway I replaced fuse and it is running again.
I left it on low speed and it ran for couple hours running around this AM.
I may get adventurous and switch fan speed later to see if it blows.
I should have looked at the other picture of the ebay switch and I would have seen the electrical part.
