2005 Holiday Rambler Issues

[dperlman]

2005 Holiday Rambler Neptune -- During winter down time I ran the generator with load and engine monthly and drove it every other time. Went to start it today (May 28 2019) and all batteries were totally dead. Got that issue resolved and started both engine and generator. Went to drive it and 1) speedometer did not work 2) ABS light on and 3) Could not get more than 30-35MPH (or less, not 100% sure of speed but it was slow). Any ideas where to start? Thanks.

[theroc]

Did you check the ground? When you said "got that issue resolved," what did that entail?

To me, and I'm not an expert, it sounds as maybe you have a bad ground and the ECM needs to be rebooted. That might be a place to start. Check the ground connection and make sure it's clean and connections are tight. Then leave the negative cable off for 15-30 minutes and then reconnect and that should reboot the computer.

I'll leave it to the experts to chime in here if that doesn't work.

[dperlman]

I took all four batteries out and three were able to be charged. I bought one replacement and then reinstall all the batteries. Do you know where the ECM is located? Thanks . . . .