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500SEC ****
Joined: 11 Apr 2005 Posts: 260 Location: Yass Valley, NSW
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Posted: Sun Apr 17, 2005 23:05 Post subject: Batteries |
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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 |
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Posted: Sun Apr 17, 2005 23:05 Post subject: Google Ads keep this community free to join! |
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lucky Lifetime member
Joined: 21 Jan 2005 Posts: 1229 Location: Cheltenham, Glos
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Posted: Mon Apr 18, 2005 8:12 Post subject: |
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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 |
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philt Newbie
Joined: 23 Apr 2005 Posts: 3 Location: N.Wales
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Posted: Sat Apr 23, 2005 21:30 Post subject: Starter motor |
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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. |
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schmoo *
Joined: 26 Mar 2005 Posts: 25 Location: Charnock Richard, Lancashire
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Posted: Sun Apr 24, 2005 9:22 Post subject: |
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sounds like the solenoid is stuck
needs servicing or something but im no mechanic (just experienced this issue before)
hth |
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philt Newbie
Joined: 23 Apr 2005 Posts: 3 Location: N.Wales
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Posted: Wed Apr 27, 2005 19:45 Post subject: Starter problems |
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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! ) |
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500SEC ****
Joined: 11 Apr 2005 Posts: 260 Location: Yass Valley, NSW
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Posted: Tue Jul 05, 2005 23:19 Post subject: |
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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 |
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lucky Lifetime member
Joined: 21 Jan 2005 Posts: 1229 Location: Cheltenham, Glos
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Posted: Wed Jul 06, 2005 8:26 Post subject: |
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500SEC wrote: |
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. |
Yes that is correct. They work in series to the stater (24V) and in parallel for everything else (12V). _________________ 1999 Land Cruiser Amazon VX Active 4.2TD Auto
Gloucestershire 4x4 Response
Landcruiser-rocks |
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500SEC ****
Joined: 11 Apr 2005 Posts: 260 Location: Yass Valley, NSW
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Posted: Wed Jul 06, 2005 22:44 Post subject: |
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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 |
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fubar Lifetime member
Joined: 20 Jul 2005 Posts: 259 Location: Suffolk
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Posted: Sun Jul 24, 2005 20:58 Post subject: |
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of course the twin battery setup is to create better balance ... its good to hear the bulbs on the '80 is 12v ... |
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