Can't charge battery for ever start plus 750 amps has air compressor. I have asked this question a lot but no good answer.

Did you check the compressor relay ? Location BJB - battery junction box , under hood fuse relay box . plus fuse #19 60 amp .this powers the compressor . If the fuse an relay or good Have a repair shop check for DTC'S - diagnostic trouble codes in the VDM - vehicle dynamics module . This module controls the air suspension . Do you know anything about automotive electronics an computers . (modules)

Make sure that the motor is receiving power. If there is a starting capacitor make sure it is good. If all else fails you could have a bad motor or a frozen pump, either of which will cause your dilemma.

Quick answer is you need a new battery as you should have 13 to 14 volts when not running and this will drop to 12.5 volts when starting due to starting loads on the system,

I have a more basic version from Home Depot. From day 1, the charge indicator never worked correctly. Have had it several years now and probably by this time, the battery is just getting weak and needs to be replaced. I found that charging by the cigarette lighter doesn't work too well. Charging by the AC adaptor overnight is the best and I do it every 4 months. Once and a while, I test it by connecting to an old starter motor. If it spins at decent speed, the charge is OK. The cigarette lighter plug connection is also good to use when you need to change the car battery and don't want to loose all your radio presets. It backfeeds the system and keeps all battery powered systems powered when the main battery is disconnected.
NEVER run the engine without the main battery connected! Good way to burn out all your electronics.

Hi, I bought a new Black & Decker one of these and when I got it home and charged it, it acted the same way. I assume it has an internal battery. These gel-cell spill-proof lead acid batteries will dry out and one cell will loose power for a load, but will indicate "full". 99% of these batteries have replacements available on line under S L A (spill-proof lead acid) batteries, or if you have a friend with a WW GRAINGER account, they stock them.

6 YEARS IS A LONG TIME FOR A BATTERY TO LAST. YOU ARE LUCKY. I WOULD GET A NEW INTERSTATE BATTERY & CHECK THE CHARGING SYSTEM, TO MAKE SURE IT IS OK. MOTOR RUNNING, THE VOLTAGE AT THE BATTERY SHOULD BE BETWEEN 13.90 & 14.80.

A smaller car 12v 4 or 5 amps charger will do the job, the slower the battery is charged the better, so use the lower setting if available.
charge it out of the bike, this way you can check the water level, and if it overflows it wont spray acid over your engine and frame.
If it doesnt start the bike after a charge, get a new battery, as running a sad battery can overload the charging electrics. and dont jump start it of a car battery that will accept more amps than the bike can produce

Hi and welcome to FixYa,

Initially, try starting with the clutch lever pulled in and / or the sidestand folded up.  Additionally, determine if there is a clicking sound.  If there is, then it would most likely be the starter solenoid.

Good luck and thank yu for asking FixYa.

The compressor is not starting either because:
1. The compressor has gone bad
2. The system is low or out of refridgerant. There may be a slow leak, when there is no refridgerant in the system the compressor will not start.

Fix:
Re-charge the system with appropriate refridgerant, if the system has a charge already or holds a charge when you charge it then the compressor should start.
If not the compressor could be bad, sometimes you can get a hard start kit instead of replacing compressor. If the system does not hold a charge then you have to find and repair the leak before anything else...

Good luck. Please give good rating, it meens a lot to me....Feel free to contact me again...