93 SL2 (auto) stalls after warmed up - put into gear.
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Junior Member
Joined: Mar 2025
Posts: 26
Thanks 02 LW300!! I wanted to get my car fixed ASAP Rock Auto's earliest shipping speed was Tuesday arrival time.. I looked at all the car parts stores. Autozone was the only one that gave me the best looking part for a today (Saturday) delivery date.
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Joined: Apr 2015
Posts: 3,229
From: Willamette Valley, Oregon
Rock Auto is a resource to locate parts. I purchase from them for big projects that can wait for shipping. I often mix and match brands to save shipping. Napa and Autozone for quick but more expensive repairs. Happy motoring!
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Joined: Mar 2025
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New booster is secure in the cabin now for the engine bay and op check
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Yeah, well, across my 3 screens I have all prices on all 5 auto parts including shipping displayed - so I choose which most equitable - from all the options - trust me - not my first rodeo - Rock Auto usually gets us with shipping costs.
Typically what I've found is I can get the exact same part from Amazon almost 4 days faster - and the price ends up being exactly the same. I already returned the core to my local Autozone 2 1.5 hours ago.
To each their one - I have a long line of Rock Auto magnets on my lift - I use them when they are the best price - and I don't need the part right away, I thought I'd get my car fixed today... NOPE.
So - Here's the verdict - My car is still dying after about 5 seconds of holding the brake down - while I was in town I went ahead and grabbed new vacuum hose for the intake to brake booster hose - haven't changed that yet - and I'm also wondering if my brake light switch may be suspect - since when I push the brake pedal my turn signal shut off - I may have a short. I'll be checking that.
Typically what I've found is I can get the exact same part from Amazon almost 4 days faster - and the price ends up being exactly the same. I already returned the core to my local Autozone 2 1.5 hours ago.
To each their one - I have a long line of Rock Auto magnets on my lift - I use them when they are the best price - and I don't need the part right away, I thought I'd get my car fixed today... NOPE.
So - Here's the verdict - My car is still dying after about 5 seconds of holding the brake down - while I was in town I went ahead and grabbed new vacuum hose for the intake to brake booster hose - haven't changed that yet - and I'm also wondering if my brake light switch may be suspect - since when I push the brake pedal my turn signal shut off - I may have a short. I'll be checking that.
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New development - starting to look at electrical - I pushed on the brake pedal just to see what the brake lights are doing - passenger side lights up nice and bright - driver's side lights up very dim all light bulbs light.
Swapped the Brake switch with the one from my parts car - just to eliminate something - no change... joy...
Swapped the Brake switch with the one from my parts car - just to eliminate something - no change... joy...
Last edited by Wingmn; Mar 29, 2025 at 07:23 PM.
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From: Willamette Valley, Oregon
I am sorry you changed the booster if it wasn’t the problem. I changed one on my first L and all I could say was F*****g Germans! What an A*****e design. My boosted had failed and my power brakes came back. I can change the booster in newer F 550 in 30 minutes. I do not currently own an S car so I can only hypothesize on your electrical problems. However nothing would surprise me.
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Joined: Jul 2005
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From: Slightly off center
When you say turn signals turn off, do you mean
completely inoperable
were flashing but go out and stay out
were flashing and freeze on (doubtful but included for completeness)
?
Do the hazards behave the same?
Does the inoperability only affect the rear turn signal bulbs or the front as well?
Do all turn signal bulbs work properly at all four corners (and hazards too) with parking brake on and car in neutral?
Trying to rule out multifunction switch.
There is only 1 power feed shared between L and R rear taillight filaments for the brake lights.
Technically, the Turn signal and brake lighting circuits do not intersect on the power side.......but if a ground goes awry -- where part of a splice pack becomes ungrounded and then the current can transfer between the two circuits......well.....that could make a mess of things.
93 SL2 Turn / Hazard / Stop lamps (my formatting tools are missing.....)
https://charm.li/Saturn/1993/SL%20L4.../Brake%20Lamp/
completely inoperable
were flashing but go out and stay out
were flashing and freeze on (doubtful but included for completeness)
?
Do the hazards behave the same?
Does the inoperability only affect the rear turn signal bulbs or the front as well?
Do all turn signal bulbs work properly at all four corners (and hazards too) with parking brake on and car in neutral?
Trying to rule out multifunction switch.
There is only 1 power feed shared between L and R rear taillight filaments for the brake lights.
Technically, the Turn signal and brake lighting circuits do not intersect on the power side.......but if a ground goes awry -- where part of a splice pack becomes ungrounded and then the current can transfer between the two circuits......well.....that could make a mess of things.
93 SL2 Turn / Hazard / Stop lamps (my formatting tools are missing.....)
https://charm.li/Saturn/1993/SL%20L4.../Brake%20Lamp/
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Junior Member
Joined: Mar 2025
Posts: 26
When you say turn signals turn off, do you mean
completely inoperable
were flashing but go out and stay out
were flashing and freeze on (doubtful but included for completeness)
?
During my test drive when I pushed on the brake pedal with my turn signal on - the dash light turn indicator would go out while the pedal was pushed. When I let go it came back on. I completed my turn - also managing the motor coughing. Also the motor RPMs would stabilize when I took my foot off the brake pedal - so this short is really draining the power - enough to kill spark is my guess?
Do the hazards behave the same?
Does the inoperability only affect the rear turn signal bulbs or the front as well?
Do all turn signal bulbs work properly at all four corners (and hazards too) with parking brake on and car in neutral?
Trying to rule out multifunction switch.
There is only 1 power feed shared between L and R rear taillight filaments for the brake lights.
Technically, the Turn signal and brake lighting circuits do not intersect on the power side.......but if a ground goes awry -- where part of a splice pack becomes ungrounded and then the current can transfer between the two circuits......well.....that could make a mess of things.
93 SL2 Turn / Hazard / Stop lamps (my formatting tools are missing.....)
https://charm.li/Saturn/1993/SL%20L4.../Brake%20Lamp/
completely inoperable
were flashing but go out and stay out
were flashing and freeze on (doubtful but included for completeness)
?
During my test drive when I pushed on the brake pedal with my turn signal on - the dash light turn indicator would go out while the pedal was pushed. When I let go it came back on. I completed my turn - also managing the motor coughing. Also the motor RPMs would stabilize when I took my foot off the brake pedal - so this short is really draining the power - enough to kill spark is my guess?
Do the hazards behave the same?
Does the inoperability only affect the rear turn signal bulbs or the front as well?
Do all turn signal bulbs work properly at all four corners (and hazards too) with parking brake on and car in neutral?
Trying to rule out multifunction switch.
There is only 1 power feed shared between L and R rear taillight filaments for the brake lights.
Technically, the Turn signal and brake lighting circuits do not intersect on the power side.......but if a ground goes awry -- where part of a splice pack becomes ungrounded and then the current can transfer between the two circuits......well.....that could make a mess of things.
93 SL2 Turn / Hazard / Stop lamps (my formatting tools are missing.....)
https://charm.li/Saturn/1993/SL%20L4.../Brake%20Lamp/
Last edited by Wingmn; Mar 30, 2025 at 08:55 AM.
Thread Starter
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Junior Member
Joined: Mar 2025
Posts: 26
I am sorry you changed the booster if it wasn’t the problem. I changed one on my first L and all I could say was F*****g Germans! What an A*****e design. My boosted had failed and my power brakes came back. I can change the booster in newer F 550 in 30 minutes. I do not currently own an S car so I can only hypothesize on your electrical problems. However nothing would surprise me.