Originally Posted by M Pete

This turned out to be quite a simple fix. As it turns out there should not be a nut on the post at 9 O'clock as you look at the gauge from the back. That is the ohms "wire" and a nut on there can ground that out. When I replaced my printed circuit recently I put one on there and after doing some searching found out that is not a good idea. I removed it and what do you know, it works. You learn something every day.

Originally Posted by Willcox Corvette

Soon...

We will have replacement resistors for all the 1965-1976 cars and the 1977-1982 cars in a week or so. We thought we had them ready to go and the people that made the boards goofed them... It's funny because when we design the Gerber files for the boards and send them in...there wasn't any issue.... but sometimes we have to add an extra hole so that they will drill through all holes (just like our tach boards and the delay timer boards). When we left the hole off, they didn't drill through all the holes and so the boards have continuity on both sides and they are were not supposed to be this way... The boards we received will work for the 77-82 cars but not for the 1965-1976 cars.. it's complicated...

Funny thing is this is the same reason the imported tach boards need washers.... they're plated through and running a small drill through the holes would solve the issue (aside from their cap bleeding off)... It's even more funny because this is why we made our USA tach boards....

We tried to tell them what they were doing wrong, and we were contacted by their supplier... We told them about the cap issue... and what we were doing to fix the bleeed off issue... and they got pissed at us and was told to not contact their import supplier again... go figure.... Even though their supplier purchased a calibration machine from us to see if he could figure out the issue.

I believe the idiots name was Chris Fink..... He pissed me off so bad that I figured it was cheaper for me to make the board than to continue fixing theirs... so I did...

So right now we are waiting for new boards and then we'll stuff them as quickly as possible.

Here are the links for the resistors, but please know that they will be about 1 week from being completed... maybe longer.

We have the pcb's made in California and sometimes they are a bit slow getting them to us. The resistor posted below is from our proto...

You can view all the options at this link... https://willcoxcorvette.com/catalogs...ar=&q=resistor

If the OP is working on a temp gauge and you want to dial it in then use the adjustable resistor. It's really the best option and the adjustable resistor will work for other gauges but it's set at 90 ohms... so if used on a 1977-1982 car on another gauge it would need to be dialed in according to the color of the existing resistor assuming it's being used on another gauge other than a temp gauge. On 1977-1982 cars (other gauges aside from temp gauge), the resistance is determined by color of the existing ceramic resistor.

https://willcoxcorvette.com/catalogs...=adjustable+re

Originally Posted by Buccaneer

This company that makes your boards doesn't happen to be in CO does it? If so, I feel your pain. We had everything perfect on our HAM ECM boards...Until they started manufacturing them. Ugh! Thankfully we noticed the issue right away and they had to redo all of them over.