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starter wiring/differences '94 850/'98-00 V/S70?

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

benrk
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starter wiring/differences '94 850/'98-00 V/S70?

Post by benrk » Mon Oct 08, 2012 5:13 pm

Hi,

Just been fiddeling with replacing the starter motor on my '94 850 2.4 non-turbo, ordered a "TYC" from rockauto, what got delivered said '98-00 V/S70, look & fit is the same, just the electrical connections are trouble: the original Bosch starter has 1 spate lug above the power supply terminals, the tyc has 2 spate lugs, 1 above & 1 below the terminals, I didn't even notice the second lug when I first put it in, when I hooked everything back up - using the top spate like on the Bosch - nothing happened at all, concluded the brandnew made-in-china $60 starter was trash & took it back out, now I saw the second spate, ran booster cables to the starter lying on the ground & with a little jumper wire hooked power tho the lower spate, solenoid engaged & motor spun, put it back into the car & hooked up the green wire to the lower spate, the only thing happening is the clack of the solenoid engaging but the motor doesn't spin (yes, also after charging the battery & even with the charger in start mode, battery terminals are cleaned) made a jumper wire to supply both spates with power simultaneously, solenoid engages, motor spins, but the jumper cable is getting quite warm & sparks a lot holding it to the battery terminal, I kinda have the feeling I'm producing a short circuit here.

Does anybody have a clue what the second (top) spate on a TYC starter is meant for? Do the '98-00 generally have 2 spate lugs on the solenoid? Is there a wiring chart online somewhere for the later models?

Thx, Ben
'01 V70 XC 290tkm
'94 850 362tkm (sold)
'09 VNL730 1.3mio km
'82 BMW 633 CSi (for sale)
'85 VW Cabriolet (needs resto, for sale, inc parts Scirocco, new parts & chrome)

precopster
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Re: starter wiring/differences '94 850/'98-00 V/S70?

Post by precopster » Mon Oct 08, 2012 5:25 pm

Welcome to MVS.

Hover your mouse over "Repair Database". You'll see the "wiring diagrams" section.

It's quite natural for a jumper cable to become hot and produce huge sparks while driving a starter with jumpers. There is a lot of current drawn by this and it should only be on for no more than 10 seconds at a time. I always allow a starter to cool before retries if cranking for more than 30secs for this reason.

I put a 850 starter in a '99 V70 and there was no EXTRA terminal. Rockauto isn't known as one of the more trusted and knowledgeable suppliers for Volvos. Our sponsors on the banner above are.
Current cars:2002 XC70, 2006 Ssangyong Rodius (Stavic), 2006 XC90 2.5T, VW Transporter 2.5TDI

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Re: starter wiring/differences '94 850/'98-00 V/S70?

Post by Ozark Lee » Mon Oct 08, 2012 5:34 pm

My spare starter from my '99 only has one lug but I think that I recall that the starter that is actually on the car had two that were bridged together on the back of the solenoid. I just plugged the wire (there is only one control wire) into one of them and left the other one open.

...Lee
'94 850 N/A 5 speed
'96 Platinum Edition Turbo
Previous:
1999 V70XC - Nautic Blue - Totaled while parked.
1999 V70XC - RIP - Wrecked Parts Car.
1998 S70 T5
1996 850 N/A
1989 740 GLT
1986 740 GLT
1972 142 Grand Luxe

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Re: starter wiring/differences '94 850/'98-00 V/S70?

Post by cn90 » Tue Oct 09, 2012 8:56 am

starter.JPG
starter.JPG (54.83 KiB) Viewed 1851 times
2004 V70 2.5T 100K+
2005 XC90 2.5T 110K+

benrk
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Re: starter wiring/differences '94 850/'98-00 V/S70?

Post by benrk » Tue Oct 09, 2012 11:36 am

thx for the welcome & your replies!

I found the wiring diagrams & '94 & '98 are both wired the same, nothing else but 30 & 50 going to the starter, checked with our shop manager, he hasn't ever seen anything else going to a starter either.

The two things that are completely startling me are that the two spade lugs are not bridged together, top one does nothing if powered alone & that the lower one did engage & spin the starter on the ground while only engaged but not spun it in the car.
Given the high load that seemed to have been present when powering both spades simoultaneously I'm somewhat reluctant to bridge them together & possibly fry the ignition switch, I think I'll bridge the top one to 30 while plugging 50 to the lower one & see what happens...

Thx guys, great forum!
'01 V70 XC 290tkm
'94 850 362tkm (sold)
'09 VNL730 1.3mio km
'82 BMW 633 CSi (for sale)
'85 VW Cabriolet (needs resto, for sale, inc parts Scirocco, new parts & chrome)

cn90
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Re: starter wiring/differences '94 850/'98-00 V/S70?

Post by cn90 » Tue Oct 09, 2012 12:09 pm

Can you post a picture of the starter?
2004 V70 2.5T 100K+
2005 XC90 2.5T 110K+

benrk
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Re: starter wiring/differences '94 850/'98-00 V/S70?

Post by benrk » Tue Oct 09, 2012 12:56 pm

Not right now, I'm truck driver & only home weekends.

The old starter had 1 spade lug I beleive verticaly oriented above the screw on terminals where in your starter pic there is that square hole in the plastic, the new one has one spade lug horizontaly above the terminals & one verticaly below like on your starter, other than that it looks identical to the old starter (apart from the dirt ;-) )
'01 V70 XC 290tkm
'94 850 362tkm (sold)
'09 VNL730 1.3mio km
'82 BMW 633 CSi (for sale)
'85 VW Cabriolet (needs resto, for sale, inc parts Scirocco, new parts & chrome)

precopster
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Re: starter wiring/differences '94 850/'98-00 V/S70?

Post by precopster » Tue Oct 09, 2012 2:48 pm

To find out the load on your system bridge them and measure resistance with a meter to ground. Compare this to old starter reading. If resistance is lower by huge margin on bridged terminals you have a problem.
Current cars:2002 XC70, 2006 Ssangyong Rodius (Stavic), 2006 XC90 2.5T, VW Transporter 2.5TDI

www.precisioncarmodules.com.

benrk
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Re: starter wiring/differences '94 850/'98-00 V/S70?

Post by benrk » Sat Oct 13, 2012 5:45 pm

Problem solved!

As some here might have already guessed, it's a chapter for the book "mistakes & blunders" I wired my little loop from the bolt terminal pin 30 to the pin 50 spade with the same result, "clack" & nothing else, got the multimeter out, battery 12.3V bolt terminal @ starter 0?!? turns out, other than in the picture above there's not 1 thick red cable on the bolt on my car but 2, 1 carries the load from the battery, the other doesn't carry any load (at least as long as the 1 from the battery is not attached...) squeezing in the new starter I must have pushed the cable frim the battery to tha back, it was hidden between starter & motor block, once I had that hooked up the starter turned just fine.

Little reminder to myself: don't think it's just a starter & nothing complicated that requires extra attention, don't do things in a hurry, look at everything twice.

Thx for your efforts guys & have a great weekend.
'01 V70 XC 290tkm
'94 850 362tkm (sold)
'09 VNL730 1.3mio km
'82 BMW 633 CSi (for sale)
'85 VW Cabriolet (needs resto, for sale, inc parts Scirocco, new parts & chrome)

cn90
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Joined: Wed Mar 31, 2010 9:54 am
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Re: starter wiring/differences '94 850/'98-00 V/S70?

Post by cn90 » Sat Oct 13, 2012 6:25 pm

Any Pic of your starter so others know what to do?
2004 V70 2.5T 100K+
2005 XC90 2.5T 110K+

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