Steve (WRDR 762)

WOW! I can't believe it, but I got it working. So, it was user error (not at all shocking there!). But, in simple, the accessory connector is upside down compared to most of the other 16 pin radios. Everything I found online states that pin 1 is bottom left while looking at the back of the radio with the heatsink facing down. Apparently, this is WRONG for the M1225 (at least this version of it). I dug through the service manual and found that pin 1 is top right. I checked the ACTUAL pin 8, and guess what.. working perfectly. Hopefully this helps someone else in the future too!
 
If you are using one of the cheap, china no-name repeater cables, the blue pot for RX adjustment needs to be facing UP (towards the top of the radio). I am very thankful that plugging them in upside down didn't blow anything up, since I read online that can easily happen if these things are installed upside down.
 
Mystery solved!

WOW! I can't believe it, but I got it working. So, it was user error (not at all shocking there!). But, in simple, the accessory connector is upside down compared to most of the other 16 pin radios. Everything I found online states that pin 1 is bottom left while looking at the back of the radio with the heatsink facing down. Apparently, this is WRONG for the M1225 (at least this version of it). I dug through the service manual and found that pin 1 is top right. I checked the ACTUAL pin 8, and guess what.. working perfectly. Hopefully this helps someone else in the future too!
 
If you are using one of the cheap, china no-name repeater cables, the blue pot for RX adjustment needs to be facing UP (towards the top of the radio). I am very thankful that plugging them in upside down didn't blow anything up, since I read online that can easily happen if these things are installed upside down.
 
Mystery solved!

WOW! I can't believe it, but I got it working. So, it was user error (not at all shocking there!). But, in simple, the accessory connector is upside down compared to most of the other 16 pin radios. Everything I found online states that pin 1 is bottom left while looking at the back of the radio with the heatsink facing down. Apparently, this is WRONG for the M1225 (at least this version of it). I dug through the service manual and found that pin 1 is top right. I checked the ACTUAL pin 8, and guess what.. working perfectly. Hopefully this helps someone else in the future too!
 
If you are using one of the cheap, china no-name repeater cables, the blue pot for RX adjustment needs to be facing UP (towards the top of the radio). I am very thankful that plugging them in upside down didn't blow anything up, since I read online that can easily happen if these things are installed upside down.
 
Mystery solved!

WOW! I can't believe it, but I got it working. So, it was user error (not at all shocking there!). But, in simple, the accessory connector is upside down compared to most of the other 16 pin radios. Everything I found online states that pin 1 is bottom left while looking at the back of the radio with the heatsink facing down. Apparently, this is WRONG for the M1225 (at least this version of it). I dug through the service manual and found that pin 1 is top right. I checked the ACTUAL pin 8, and guess what.. working perfectly. Hopefully this helps someone else in the future too!
 
If you are using one of the cheap, china no-name repeater cables, the blue pot for RX adjustment needs to be facing UP (towards the top of the radio). I am very thankful that plugging them in upside down didn't blow anything up, since I read online that can easily happen if these things are installed upside down.
 
Mystery solved!