Thanks so much for the advice
Dave78Chief. I found the schematic you referred to right away. I put another circuit board in it and still had the poor voltage to the fuel pump... 9-10vdc so I had to pull out the generator to find R6 and R7.
(See my jerry-rigged slide hammer puller to get the generator to slide out!) Looks like the ball bearings in the slide out rail mechanism is way past gone.....
Does anyone know if this is repairable? (2nd pic)
Then I found R7 (1st pic)... it was a mess... I'm unsure if it was my pulling on the terminal that broke it or if it was the worn out ceramic that was already broken... but when I checked it, it had about 32Meg-ohms across it. Because the installation instructions said that "There may or may not be an external fuel pump resistor" (Control Board Update Issues)... I just jumpered out the terminals and bypassed it....
does anyone know for sure if its needed or not? I really thought that this may have been the reason I was only getting 9-10vdc to the fuel pump.
Since R6 was right next to R7, I checked it too.. the terminals/wires looked good.... I measured 5.3 ohms across it. (No pic's of this one, looks just like R7, just smaller)
I also checked CR9, (3rd pic) the diode controlling the power flow once the generator output is up, it appears to be working but my readings I thought were a bit high... 3.7 Meg ohms (when conducting) and Infinity when reverse biased.
After many minutes of frustration, I checked the voltage at the starter solenoid... it dropped to 10vdc whenever I was trying to start.... Wa-Lah! (the light bulb came on!
) At first thought, I figured there was a cable terminal or connection bad leading back to the generator. But then I checked the battery... its voltage dropped to the same 9-10vdc too! (I'm thinking now...."Bad, bad, bad, battery!)
To make a long story short, I used my AGM trailer 12v battery in parallell with the coach battery and connected it with jumper cables... the fuel pump still had less than 12vdc to it but now it kicked out the fuel like a pissed off copperhead would spit its venom....and I was only reading about 10.5vdc to the fuel pump now! Even so, the Generator kicked over and ran like a champ after that.... I think the coach battery is going bad (I have no test equip to do proper load test or specific gravity test) and or the cables/connections/battery isolation relays are dropping the 2vdc somewhere along the way probably due to high resistance. Anyway, its running now. It even starts without the parallell battery. I just hope it stays that way....
One question I still have though is
should I replace the R7 wirewound resistor or just leave it bypassed?
Thanks again for the help y'all!