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Starter test while still in the Northstar engine? 98 Deville


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Welcome. The starter is in the v of the engine but I suppose it could be done by applying 12v to the appropriate wiring runnng to the starter. Unfortunately I think the starter relay is on the starter.

One relevant Video https://youtu.be/KBtpFmY41eU

Bruce

2016 Cadillac ATS-V gray/black

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Thank you Bruce! The problem started when I attempted to start the car. There was no response from the starter, but both the trunk and fuel door lids popped open. Then nothing. Triple AAA jumped the battery, the car started. The tech said the charging system was working. I drove home, parked it and the, again, nothing from the starter. The start relays have been properly tested and reinstalled. The shifter has no affect on the problem. I have replaced the battery with a new one.

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sounds like battery terminals to me.

When you try to start it does the whole car go dead?

GM FAN FOREVER

Nice, clean, luxury= fine automobile

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The trunk and fuel lids tell you nothing about the health of the battery.

You said you replaced the battery, when was it replaced?

Did you replace the battery and it still does the same thing, or was the battery replaced previously?

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Thank you gentlemen. The ignition operation sequence seems to be normal: panel lights go on, then off when in the start position, but nothing from the starter. The battery was just replaced after this situation developed, hoping to eliminate that possibility. There is also a significant battery drain going on, perhaps this is contributing...

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You need to check for codes, do you know how? You do not need a reader if its older than 2004 or so.

Post the codes here.

You need to find the battery drain. What makes you think you have a battery drain? Do the lights dim when you turn the key to start?

What year is this?

I recently replaced a starter because the solenoid was bad, you turned the key and nothing.

Post codes so we know if this is security related.

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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It is possible you have a parasitic drain that is running the battery down. Disconnect the negative battery lead and connect an ammeter in series between the disconnected cable and the negative battery terminal. Wait for all the systems to "go to sleep" then look at the ammeter - Ideally, the drain should be less than 30mA (.03Amps). If it is greater than that, begin removing fuses until you see the reading drop below 30mA. That will be the circuit that you will need to troubleshoot.

Kevin
'93 Fleetwood Brougham
'05 Deville
'04 Deville
2013 Silverado Z71

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Thank you gentlemen. The ignition operation sequence seems to be normal: panel lights go on, then off when in the start position, but nothing from the starter. The battery was just replaced after this situation developed, hoping to eliminate that possibility. There is also a significant battery drain going on, perhaps this is contributing...

This sounds like a corroded battery terminal. You have a 98 Concours, I think the 98 has two wires connected to ONE connector, but you should pull the red boot off and clean the connector with a wire brush. If there is white corrosion you can use baking soda and water to get rid of it. It may not look exactly like this, but this is what you are looking at:

PositiveBatteryTerminal-1.gif

Some years have a two wire positive cable at the terminal, the cables sandwich a lead lug and corrosion gets in there compromising the connection. Check your positive cable at the battery connection, there will be a red "boot" that slides off. First, push out the lead lug, if I recall, then the two wires will come out. Clean the two connectors, lug and boot with baking soda and water if it is badly corroded (white or green) or you can wire brush it if its not too bad. Wear gloves and eye protection, its acid, wire brushing it can flick some in your eye and it will burn your hands. I find that making a nice slurry of baking soda and water and brushing it on and letting it sit gets rid of the acid buildup and neutralizes it. Hose it down with water to clean the baking soda mixture making sure to keep it off the paint.

While you are at it look over the negative connector to make sure there is no corrosion under the boot.

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Thank you. So, I pulled the red boot and cleaned the lug thoroughly. However, below that is a permanently pressed connector that joins the two wires together. It does not appear to have any corrosion that is visible. Perhaps, internal? Also, there are no trouble codes displayed nor any pending codes.

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Nope, yours is two into one, the older models two single wires joined with a lead lug.

At least you are cleaned up the connections and eliminated that

What year is this, how did you extract codes?, through the dash? We are looking for B codes or Body codes, not P codes.

Can you post codes, that is important

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Thanks again, gentlemen.  The 'parasitic drain' was the heater on the driver's seat.  Any suggestions on how to clean up that situation? I am using "ultra gauge em Plus'.  I don't think it gives me any body codes.  How do I obtain those?  I don't think the 98 concourse has any 'thru the dash' code reading capability.  Am I wrong?

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it does. 

At your climate control unit under the radio.

Hold the off button and the passenger warmer buttons simultaneously for 3 seconds.

All will display on the Instrument cluster message center module by module

GM FAN FOREVER

Nice, clean, luxury= fine automobile

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Thanks so much.  The on board computer ran thru a bunch of module history and then displayed 'no ACM codes' and 'no CCP codes'.  What did I miss?  Is there a way to open up the individual module history reports, or is that necessary?

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Write down all codes even history, replay the readout till you get all the codes.  

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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