Suzuki Swift AT/Won't shift from Park unless AC is OFF

[mina_nuka]

may diagram ka bro?

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kahit drawing lang hehehe

i cant find your car's wiring diagram from google. if your brake lights still work, tap from there but cauterize the wire feed or input to the BCM. the only problem is, your solenoid will operate every time you step on the brake pedal.

[ninjababez]

the only problem is, your solenoid will operate every time you step on the brake pedal.

ano ibig sabihin bro na will operate everytime? is this bad, ninerybos tuloy ako eh hehehe

[oj88]

Diyos ko! STOP telling the TS to modify the electricals any further. You're not even sure if the brake switch ckt is positive or negative trigger and/or whether it is load bearing. For all we know, it's just an input for the BCM and does not carry with it any current capability to support an electrical load.

PLEASE, don't give the TS any more ideas that can further damage his vehicle or put his life and his passenger in harm's way.

[mina_nuka]

Diyos ko! STOP telling the TS to modify the electricals any further. You're not even sure if the brake switch ckt is positive or negative trigger and/or whether it is load bearing. For all we know, it's just an input for the BCM and does not carry with it any current capability to support an electrical load.

PLEASE, don't give the TS any more ideas that can further damage his vehicle or put his life and his passenger in harm's way.

this might be the first time i would know of a car where the brake light switch is on the negative side.
i have worked on asian, domestic and european cars for decades and studied their wiring diagram, i havent seen one yet where the switch was on the negative side,
would you mind sharing what make, model and year that car would be?

[oj88]

this might be the first time i would know of a car where the brake light switch is on the negative side.
i have worked on asian, domestic and european cars for decades and studied their wiring diagram, i havent seen one yet where the switch was on the negative side,
would you mind sharing what make, model and year that car would be?

You're exposed naman pala sa OEM wiring diagrams. Why are you suggesting ghetto mods that has a potential of causing more damage? You know that BCMs and their connections are designed a certain way that applying voltage, grounding, or putting an electrical load the wrong way has the potential to cause more problems. The last thing the TS need is an extraneous voltage, ground, or load applied to the BCM, one way or another.

I have seen many interior switches that are negative-triggered, in that, the line is asserted 'high' and grounding the input through a switch will trigger a response.

[dr. d]

kawawa naman si TS.
hilong-hilo na siguro, sa dami ng suggestments.

[mina_nuka]

kawawa naman si TS.
hilong-hilo na siguro, sa dami ng suggestments.

Hoho ngahe.


That's why I suggested to take the solenoid off the reins of the BCM. Older cars did not have this solenoid.


Yes the proper way is to check the circuits wire by wire and check the BCM. Better yet try with a known good working BCM. The TS is trying to reach out for a solution maybe because that was how much he is willing to spend on it.

I still did not get the type of car with the brake light switch on the negative side of the load.

[mina_nuka]

ano ibig sabihin bro na will operate everytime? is this bad, ninerybos tuloy ako eh hehehe

the shift release solenoid that you hear when you step on the brake pedal with the ignition switch on is that solenoid.


if your car has the release button, you can even opt to remove the solenoid and actuator just like the older automatic transmission/transaxle equipped car.