Question about 2006 Cadillac CTS

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2006 CTS 3.6 manual trans: starter will not engage; all other accessories work OK, battery is fully charged. Does not even 'click'. Nothing.

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Check the clutch safety interlock switch above the pedal.

Please see my tip at . These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.

Posted on Oct 12, 2010

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  • pwclark733 Oct 12, 2010

    Understood, I already located the interlock switch (very ticht in there), so here is the next question: will disconnecting (unplugging) the switch effectivly bypass it? In other words under normal conditions would disconnecting the switch allow the starter to operate.

  • Jeffrey Turcotte
    Jeffrey Turcotte Oct 13, 2010

    I will have to look it up to be sure, but in most cases you have to short the connector terminals together to bypass. use a thick paper clip in the connector to connect the 2 terminals.

  • Jeffrey Turcotte
    Jeffrey Turcotte Oct 13, 2010

    Unfortunately I cannot access your wiring diagrams in readable form, but I'm pretty sure you have to short that connector to bypass. If that doesn't do it for you, I would suggest next shorting the solenoid hot terminal to start terminal, as in the picture in my tip. Make sure the tranny is in neutral and the parking brake is set. If the starter runs by jumping, we have to trace back to the ignition switch. I think there may be a start relay in the engine compartment relay box. That would be the next place to look if the starter jumps OK. If you can find that relay, you can interrogate the relay socket to see if the ignition switch is getting it's start signal to the relay. If you don't have a test light to interrogate the relay socket, have someone hold the key in start while you pull the relay out and plug it back in. If the signal is there and the relay is good, the relay should click. Sorry this is a little hit and miss. Working without the wiring diagram is not going to be easy.

  • pwclark733 Oct 13, 2010

    Great advice, Thank You.
    I will continue diagnosis in the morning.


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If there is no click click when you turn the key,the starter relay would be the best to start with...and cheapest.Schematics and manuals are copyrighted which means no such thing as a free download for them so you can ask a dealer where the relay is,libraries sometimes have chiltons and haynes,or go to a parts store and just look it up or call and they may even tell you.Good luck! GregP.S.No click is usually a great indicator that the relay is bad.

Posted on Oct 12, 2010


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1 Answer

Turn key, solenoid whines does not turn over, ground wire from battery gets hot.touched cable directly to pos term and starter, nothing happened.

Check the battery is fully charged, clean the battery posts and terminals, with a volt meter check for battery voltage on the battery side of the starter solenoid , if ok check for battery voltage on starter side of solenoid while starter engaged , if no voltage replace solenoid, if voltage fault in starter motor.

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Try boosting it. If it starts and keeps running with a boost, but dies soon after you remove the boost, the battery is bad.

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I have a 2006 cts cadillac and it will not crank. I drove to work this morning and it is 2:00pm now and it will not crank up at all. The radio comes on but the battery volt only says 12 when they usua

Is the battery as old as the car? If so, it's certainly the battery. OEM batteries on luxury cars last a surprisingly long time, but six years is usually the limit. Replacement batteries (in my experience) only last four years at most. So even if this isn't the original battery, it's time for a change. By the way, when a battery needs a charge or a replacement, it will be able to run accessories (such as a radio or cabin lights), but will not have enough power to crank the starter.

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I gotta 2005 cadillac cts and when I try to start

have a load test done on the battery as the readings mat be fully charged but if there is a bad cell then the moment that you engage the starter the voltage drops to below 6 volts. Ensure that the battery posts and terminals are shiny clean.

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Starter will not engage - not even a click

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2005 Cadillac CTS tried to crank my car all it will do is one click i took the battery to go get tested and it was 12.3 amps they said it tested fine. So i put the battery back in and same issue 1 click i...

12.3 amps is a bad battery , 500 amps is good, but you meant volts
sure. (by the way sir your battery is discharged, gets forgot?)

12.3 volts rested is a discharged,state ambient temp and can tell by how much using SOC tables.
try jumper cables, try a fully charged battery, 12.6v is fully charged at room temp, rested. barrow a charged battery for friends car.

State of charge.. at room temp.12.3 is 50% charged,
the shops dont tell you that, just GOOD battery, bad,
its your job to charge, it
then when cars starts, the alternator takes over, 100%

the reason you are not going good ,is because no voltmeter in hand. For SURE.
guessing dont work here, only tests and measurements.

1; can you try turning the cars crankshaft by hand.?
siezed, bingo
2: can you hot wire the soleniod small pin to the outside big pin
like here,
if the battery is weak, this test is useless. on all cars.
if it works then the key line is dead
if not the battery ,or cables or starter is bad.
there are 3 parts to a starter,
i repeat, the battery (charged) the cables and the starter.
engine turns by hand. yes.
those are all facts.
another tack.
voltmeter across battery lugs.
crank 0v bad battery or shorted or siezed motor.
12v, starter dead open circuit.
10v typical with fast cranking.
you can see this in 2 dimensions. here.
time is the horizontal axis.

if living in Nunavut city, cancel my help.
new tables.

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1 Answer

2006 cts won't start

charge battery... you might have a surface charge somewhere in the system if it just randomly happened

Jul 25, 2013 | 2006 Cadillac CTS

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Check battery terminals and voltage drop should not go below 11 volts when starter engaged.sounds like weak battery even new batteries could be weak if left on shelf to long fully charge on low amp charge overnight

Btw, I’m available to help over the phone in case u need at

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When I turn the key it only clicks, starter does not engage

It's either a bad battery (low on charge) or a loose ground wire. If you are SURE that the battery has 12 volts (yes, even a low battery will run your lights, radio, door ajar chime, etc., but won't have enough to start the car). If the battery is fully charged and your volt meter shows 14.4 volts (fully charged battery reading), then it's a ground wire. There are two locations. The negative battery cable itself on the battery, and the location on the frame or engine where the cable connects to.If these are ok, check the positive cable connection on the starter.

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I have a 1996 Honda Accord LX 5 speed manual trans. The car had some battery trouble, and when I went to get it charged; the tech said that it was so low he didn't think it would work. I came back, and to...

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