The Toyota Landcruiser Owners Club

500SEC · Posted: Sun Apr 17, 2005 23:05 Post subject: Batteries

Can someone please advise why 80 series models have two batteries in the engine compartment ?

Cheers,
_________________
Frederick (London SW15)

1986 Mercedes 500SEC
1996 TLC 4.2 GS TD
2006 Ford Falcon ute

Google · Sponsor

lucky · Posted: Mon Apr 18, 2005 8:12 Post subject:

The 80 Series Diesel uses 24V starting but 12 v running. There is a starter battery circuit that switches the two batteries in series for the starter motor. All other circuits use 12V.

It's so that you can use a smaller and more efficient starter motor than a 12V one that would need to be pretty large to turn over the 1H engines.
_________________
1999 Land Cruiser Amazon VX Active 4.2TD Auto
Gloucestershire 4x4 Response
Landcruiser-rocks

philt · Newbie Joined: 23 Apr 2005 Posts: 3 Location: N.Wales

I have a 93 4.2 VX with a starter problem. I started it this morning, but the starter kept running after I released the key.I then switched off, engine stopped running but starter kept running.Switched On/Off numerous times but still the same. Eventually had to disconnect both batteries to stop engine cranking.
I have not had chance to look yet but suspect starter solenoid tips have welded - has anyone come across this problem before? How is the second battery switched in, the starter is 24v whereas the rest of the electrical system is 12v? Does anyone have a wiring diagram?
Any help much appreciated.

schmoo · Posted: Sun Apr 24, 2005 9:22 Post subject:

sounds like the solenoid is stuck

needs servicing or something but im no mechanic (just experienced this issue before)

hth

philt · Newbie Joined: 23 Apr 2005 Posts: 3 Location: N.Wales

Further to previous post - have now stripped down the starter.There are two coppor contacts inside the solenoid housing, one was like new,the other almost completely burnt up. I made up a new one from coppor bus bar and re-assembled. So far no problems - starter working perfectly ( but I will keep a 10mm handy just in case! )

500SEC · Posted: Tue Jul 05, 2005 23:19 Post subject:

My 4.2TD has two 12 v batteries. Is this right ? I was expecting one 12v and one 24volt. Haven't noticed any electrical or starting problems.
_________________
Frederick (London SW15)

1986 Mercedes 500SEC
1996 TLC 4.2 GS TD
2006 Ford Falcon ute

lucky · Posted: Wed Jul 06, 2005 8:26 Post subject:

500SEC · Posted: Wed Jul 06, 2005 22:44 Post subject:

Phew... that's a relief and makes sense. Had wondered why I'd never seen a 24v car battery before.
_________________
Frederick (London SW15)

1986 Mercedes 500SEC
1996 TLC 4.2 GS TD
2006 Ford Falcon ute

fubar · Posted: Sun Jul 24, 2005 20:58 Post subject:

of course the twin battery setup is to create better balance ... its good to hear the bulbs on the '80 is 12v ...