Aux Start to Boost Cranking Amps
2007 Fleetwood Terra, F53 chassis. The coach has Power Gear electric leveling system which requires a very healthy chassis battery. If the chassis battery is weak, the jacks don't work. My question ...
Forum Discussion
Yes .... Arrive at destination, batteries should be charged from driving, leave engine running, use the jacks to level the RV
If you need to use the aux start switch to boost the engine battery, you have 2 problems, a weak chassis battery that should be replaced and a charging system that is not working correctly, because the house and chassis batteries should already be combined when the engine is running,
There is an exception to this
If your MH has a diode based battery isolator instead of the battery control center box, that is common on many MHs
A diode style isolator let's both batteries charge while keeping them separate, if you have this then yes you must press the aux start switch to combine them to provide extra power to the chassis system for the jacks(if chassis battery is weak)
The BBC cost more $$ takes more time to install than a diode isolator, so some RVs do not have the BBC, but instead have the less costly diode isolator and a less costly momentary duty relay for the aux start function
Instead of the heavier more reliable continuous duty relays used in the BCC
If you need to use the aux start switch to boost the engine battery, you have 2 problems, a weak chassis battery that should be replaced and a charging system that is not working correctly, because the house and chassis batteries should already be combined when the engine is running,
There is an exception to this
If your MH has a diode based battery isolator instead of the battery control center box, that is common on many MHs
A diode style isolator let's both batteries charge while keeping them separate, if you have this then yes you must press the aux start switch to combine them to provide extra power to the chassis system for the jacks(if chassis battery is weak)
The BBC cost more $$ takes more time to install than a diode isolator, so some RVs do not have the BBC, but instead have the less costly diode isolator and a less costly momentary duty relay for the aux start function
Instead of the heavier more reliable continuous duty relays used in the BCC
