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1996 Volvo 850 tries to start when I connect the battery cables

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

beigg
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Year and Model: 850 97
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beigg

Re: 1996 Volvo 850 tries to start when I connect the battery cables

Post by beigg » Wed Aug 24, 2016 4:32 pm

Check for exposed/rubbing wires going past the front engine mount and the harness containment bracket. Runs along the horizontal sub-frame lateral support brace.
ugh smh 850 Turbo fridge

Myvolvo850
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Year and Model: 1996 850
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Myvolvo850

Re: 1996 Volvo 850 tries to start when I connect the battery cables

Post by Myvolvo850 » Wed Aug 24, 2016 4:46 pm

It's deffinatly electrical... I decided to just wire I a toggle switch for the time being... works perfect..I'm dreading having to chase down that wire

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BEJinFbk
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Year and Model: '98 V70 R
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Re: 1996 Volvo 850 tries to start when I connect the battery cables

Post by BEJinFbk » Wed Aug 24, 2016 7:31 pm

Ozark Lee wrote:I don't think that you have indicated but do you have any aftermarket equipment installed in the car? A bum aftermarket alarm/remote start setup might cause your problem and it will be difficult to sort out. I just wound up yanking one completely out of my son's 850 after it wouldn't start.

One other thing to do is remove the 210/211 relay and see what happens. That will tell you which side of the firewall to focus on. With the relay removed it should not crank with the key and it certainly shouldn't try to start without the key. If it still tries to start with the relay removed then work your way forward through the harness under the hood.

...Lee
A great point about aftermarket systems
and some excellent advice about troubleshooting.

Isolate your problem and conquer that sucker! :mrgreen:
'98 V70 R - Well Equipped for Life Up North... ;)

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