Skip to main content ↑ ↓
Topic: Start Battery, Isolator and Boost solenoid replacement (Read 604 times) previous topic - next topic

Start Battery, Isolator and Boost solenoid replacement

So... i have decided to replace by start batteries (red top Optima 34/78 which have  narrower post than the ones installed now)  Isolator (Cole Hersey 200 Amp) and Boost Solenoid (Cole Hersey 200 amp continuous) and maybe some cables if they need replacing. I am also adding a Trik-L-Start.

My question is to do with safety....I realize I have to disconnect the negatives on the start batteries prior to starting but do I need to remove the negatives off the house batteries as well????
As suggestions etc would be helpful!!!!
Peter

Re: Start Battery, Isolator and Boost solenoid replacement

Reply #1 –
Your boost solenoid and isolator will have house batteries on one side. probably best to remove both negatives for the work

Re: Start Battery, Isolator and Boost solenoid replacement

Reply #2 –
If I'm messing around with the 12 volt system I disconnect everything at the battery. No sense getting a surprise that can smoke a circuit board. If I need power for testing I know the system is hot

Re: Start Battery, Isolator and Boost solenoid replacement

Reply #3 –
Yep. Disc the ground on both

Re: Start Battery, Isolator and Boost solenoid replacement

Reply #4 –
Get a section of 1" foam pipe insulation at the hardware store.  Use a 4" piece over the lug secured by a zip time. 

Make sure your charger is off as well.  If you have solar be sure that is off too.  It never hurts to double check with a digital voltmeter.

Re: Start Battery, Isolator and Boost solenoid replacement

Reply #5 –
When you're installing your new batteries you could use the little plastic caps that came with your new batteries to cover the terminals. I always keep a couple around. Failing that, it's a yoga mat or a couple of rags.

When you disconnect, remove the negative cable first. When you connect put on the negative cable last.
jor