94 holiday rambler. Major electrical issue. Stairs quit working, generator won't start (just clicks). If I try to level with hydraulic jacks. Lights go out and a/c power shuts off. Engine starts

SOURCE: 94 buick lesabre security light flashing

Ok..
Your vehicle is equipaded with Factory Anti Theft System.
Called Pass key II . If the mechanic found the Code
Pass key error....
Is there a few test to Do. to know exactly the problem.

1--- check if the Old and New key Are equipaded with a Little thing (Chip or Ressistence) in the center of the key.
If not you need a key with the chip. and the correct Ohms.

2. If you just replace the battery,
Full charge the battery Attemp to start the vehicle and leave the key in run position for exactly 11 Minutes, Them turn the key to off position for 30 seconds and try to start, if the vehicle start . you did the prosses to program the key.

If the vehicle not start.
Some times this procedure will require Up to 3 times to setup.
Or more with intervals of 30 minutes,, But if not start.
Remove the lower cover of the steering column. and the the Connector orange with 2 white wires shielded with a orange cover.
NOTE.. Be sure to not Confuse with the Yellow wires and connector, They are for the AIR BAG. Dont use a Convencinal Test light on any of the Mentionated wires....

After you find the wire and saw everything ok.

3-- You will need to remove the Ignition Lock cylinder.
The ignition lock cylinder is use 2 white wires shielded with orange cover, On 90% of the cases one of the wires come broken. and the ECM loss the comunication with the Chip incrusted in the key..

SOURCE: 1979 Holiday Rambler Engine with Ford 460 stops when it gets hot

You haven't given enough info to make a real diagnosis: Does it crank but not start or does it not crank. Ill take a guess: If the problem is not cranking hot, older ford starters used paper insulation that deteriorates over time. this will cause poor starter operation when hot, which usually is better cold. If problem is not with starter, next place I'd check is the ignition coil.
I could be wrong on both though...not enough info from you!
good luck

SOURCE: Lost all electrical power while driving?

Sounds like a poor connection from either the positive or ground from the battery. Check connections at the battery, follow the cables to see if any other connections are loose.

SOURCE: 1995 holiday rambler class A motorhome. e4od

clean out your engine

SOURCE: car wont start makes a clicking noise and resets the clock everytime

Does the battery have a good charge in it. Possible bad starter to.