Mark them before you disconnect them. Do this for all your electrical connections. I just installed a new digital tstat in my White Hawk. The new digital had the same 5 or 6 colored wires that the analog one had so that was easy but if you didn't mark the wires coming out of the wall, you were in trouble. There were 3 whites and 2 reds and a yellow that went to one of the reds. I've been down that road before so this time I wrote the combos down and then took them apart one wire at a time so when I disconnected the gray wire from the tstat I reconnected the gray one from the new one to the same wire coming from the wall. PS its not gray.
It is very unproductive to everyone (Jayco also) to not do a better job labeling and having a full schematic of each build included with the documentation.
I second the advice to get a voltage meter and learn to use it. Plenty of howto info online. It will save you. Never go by color blindly. go online and watch, learn to determine which lead is + and which is -
You won't harm anything connecting a voltmeter in reverse, AC or DC.
Measure it and find out positively which is which. Then label it.
HUGE THANK YOU to all that gave me some sound advice. I found both the 40a ORANGE fuses in the circuit panel were blown as well as the 30a fuse for the power tongue jack. A quick trip to the auto store on Easter found me buying extra fuses in every amperage LOL. As for a volt meter ....ehhh not this guy, the two E's dont get along ( Eric & Electricity ) and I have a few stories to back it up