The operating range of my single key fob went from 30 feet to 3 inches like overnight. Now I have to be standing next to the driver's door in order to get the locks to respond. Of course, I tried a new battery with no change. I have not looked at the receiver yet, but there has been nothing done to the Blazer.
Is there a way to test the key fob's output signal, or the receiver's input sensitivity?
I was thinking of just getting another key fob to try....seems to be about all I can do.
Wondering if others have experienced this?

Thanks

 

Did a bit more troubleshooting; removed the circuit board from the fob case, shorted across the circuit traces where the push buttons are and had normal range.
Checked the continuity across the buttons and pretty much gone.
That is an easy fix.....took a few minutes to find a good 'ole #2 pencil, then rubbed the pencil lead (graphite) onto each black button. Afterwards, put fob back together, tested...have full range again.....DONE!

Later

 

Nice Fix and thanks for posting it!

 

Was just about to suggest you clean the contacts with a pencil eraser, but you already arrived at that conclusion. Glad you solved the issue.

 

Actually no; I had cleaned the circuit traces and the buttons with alcohol several weeks ago, thought that was the solution but it was not.
Using my DVM on the buttons, to measure resistance, showed several hundred ohms.
That is when I got the #2 pencil out, measured the lead to make sure it was graphite and not a polymer lead, rubbed the pencil onto the black buttons which made them far more conductive....which made the remote work like new.

 

if you go to oreilly auto parts they have a device attached to thier counter that can test the key fob's output

 

Yep, I thought about using that tester at O'Reilly's Auto Parts or AutoZone, but both stores have "workers" that are do not want to be bothered, so I avoid those stores unless I have to.