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Old 10-19-2017, 12:33 PM   #1
NC2000
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Default Possible LS2 Starter Issue

I accidentally crossed the terminals when hooking up the battery on my LS2. When i turn the key the lights and radio turn on but it won't start. Could i have messed up the starter? It's not easy to get to and i was curious as to where i should start to diagnose my problem and get my car back on the road. Any help is appreciated.

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Old 10-19-2017, 01:14 PM   #2
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Default Re: Possible LS2 Starter Issue

Welcome to SaturnFans, NC2000!

Was the electrical system working correctly prior to this incident? Had there been any problems recently - within the last six months perhaps?

You may already know this, so I mean no offense - every electrical issue must start with a firm knowledge of the battery's condition. Get it fully tested first, or if you already know that answer please post it here. Check fuses in the Under Hood Fuse Box (UHFB). There are some very large, high amp fuses in that box and it may be one of them that has blown. Pull them out and inspect them carefully. It's always one step at a time with the diagnosis so don't get ahead of yourself.

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Last edited by pierrot; 10-19-2017 at 01:24 PM..

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Old 10-19-2017, 01:59 PM   #3
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Default Re: Possible LS2 Starter Issue

Everything worked fine before i made the huge mistake. When you turn the key it doesn't make a sound like the starter was trying to engage. I'll check out the fuses tonight. If the fuses all look good what would be the next step.

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Old 10-19-2017, 04:52 PM   #4
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Default Re: Possible LS2 Starter Issue

Would you please inform us as to the condition of the battery?

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The blessings of liberty erode in my country.
Gov't's grown bigger, but a chance exists that it will be reduced. I'm cautiously hopeful.

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Old 10-19-2017, 05:36 PM   #5
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Default Re: Possible LS2 Starter Issue

The battery is a new battery. I was changing the battery when I crossed the wires.

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Old 10-20-2017, 03:35 PM   #6
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Default Re: Possible LS2 Starter Issue

I checked all the Large and small fuses under the hood and none of them were blown.

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Old 10-20-2017, 04:15 PM   #7
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Default Re: Possible LS2 Starter Issue

I don't know the answer to this but is there a fusible link in the starter motor cable? If there is it may have done it's job as designed and melted.

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Old 10-20-2017, 05:43 PM   #8
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Default Re: Possible LS2 Starter Issue

I donít see a fusable link. Iím sorry Iím a novice at this. That would be too easy. Anything else anyone can think of to check. Iíll appreciate any comments or answers.

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Old 10-20-2017, 08:17 PM   #9
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Default Re: Possible LS2 Starter Issue

Quote:
Originally Posted by floridasl22002 View Post
I don't know the answer to this but is there a fusible link in the starter motor cable? If there is it may have done it's job as designed and melted.
Fusible link aren't used in starter circuits. In my limited knowledge, starters draw the most amperage. no matter what vehicle, because it must physically turn over an engine that may have gelled motor oil in Alaska with normal temperatures well below 0F. Starters may draw anywhere from 50 -150+ amps, negating any purpose to fuse battery negative or positive cables. More current is used in lower temperatures as opposed to warm temps. The largest fuse I've discovered for cars are the 80 amp fuses used to protect electric power steering motors and circuitry - inline between battery and motor (in engine bay). Every starter wiring I've seen are directly wired to the battery and ground to ensure the battery and cables carry the large currents needed to power starters.

Fusible link wires are used to power alternators and melt when too much current flows into alternators, indicating a short within the alternator. If I'm not mistaken, alternator fusible link wires are rated for around 25 amps on the power feed to alternators. Output amperage, right up to maximum, are always on the negative/ground/frame connection, back thru the battery negative cable for recharging the battery.

Last edited by fdryer; 10-20-2017 at 08:22 PM..

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Old 10-20-2017, 08:30 PM   #10
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Default Re: Possible LS2 Starter Issue

NC2000, which engine are you using? Is the problem still there as described in your first post or has it changed. And if there are changes to symptoms, describe them so anyone here reading it will have a better perspective. Without details, anyone can guess and continue with distractions, moving away from a problem instead of narrowing it down to a specific area or part.

Mileage, maintenance done, parts replaced?

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Old 10-23-2017, 10:28 AM   #11
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Default Re: Possible LS2 Starter Issue

The motor is the 3.0 Liter V6. The car has 199,000 miles. It has been a very good car. i replace the alternator a couple of years ago. Out side of that I have done the regular servicing. The car didn't have any issues before this. When I turn the key to the first position the dashlights come on and the radio comes on. When i turn the key to crank the car the lights dim and nothing happens. I cant hear the starter try even try to kick over.

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Old 10-23-2017, 11:33 AM   #12
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Default Re: Possible LS2 Starter Issue

200k miles on the original starter is excellent. You can try testing for voltage at the starter 'S' terminal for 12v when ignition is held in START position otherwise this seems to be a worn out starter. Caution; when measuring for 12 at the small terminal on the starter, this is the start signal from the ign switch and may result in the starter suddenly powering up unless you remove the wire for voltage testing. Testing separates the starting circuit from a starter problem.

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Old 10-23-2017, 01:06 PM   #13
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Default Re: Possible LS2 Starter Issue

This was a new to me Saturn so I'm assuming that this the first starter replacement. I totaled two Saturns (not my fault) before i bought this one. I wish they still made them.
Any ides where I could find the directions to replace the starter. I'll probably do it myself. It's not an easy part to see or get to.

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Old 10-23-2017, 04:53 PM   #14
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Default Re: Possible LS2 Starter Issue

Search past threads about it. Replacing a starter is basically a no brainer to; disconnect battery negative, jacking up either the driver or passenger front wheel, using a jack stand for support and safety, crawling under, locating the starter between engine and firewall, finding the mounting bolts and three wires, disconnecting wiring, removing mounting bolts and dropping the starter. Replace with your new or rebuilt starter in reverse of removal. Note wiring (take a cellphone snapshot if necessary with phone in a sandwich baggie for dirt/grease protection) before disconnecting wiring. Once done under the car, remove jack stand, jack, lower car and reconnect battery negative. Reset radio memory and enjoy your repair when starting up.

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