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00 s430 know power to purple wire on starter
, sorry I

Customer Question
Customer: 00 s430 know power...
Customer: 00 s430 know power to purple wire on starter
JA: Thanks. Can you give me any more details about your issue?
Customer: sorry I got 12volt from switch but starter not engaging but jump it and car would run
JA: OK got it. Last thing — JustAnswer charges a fee (generally around $18) to post your type of question to Mercedes Experts (you only pay if satisfied). There are a couple customers ahead of you. Are you willing to wait a bit?
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Submitted: 1 year ago.Category: Mercedes
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Answered in 1 hour by:
12/18/2015
Mercedes Mechanic: Marty, Mercedes Technician replied 1 year ago
Marty
Marty, Mercedes Technician
Category: Mercedes
Satisfied Customers: 54,153
Experience: Bosch Certified Master Tech. Over 35 years experience.
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Hi, my name is***** you a technician? Do you have a Mercedes scan tool?

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Customer reply replied 1 year ago
I a tech work at small shop I only a snap on Solus ultra
Customer reply replied 1 year ago
Car want start by key but I can jump the purple wire and it will run I really can't tell if the starter relay is bad
Customer reply replied 1 year ago
Does the starter relay powers that purple wire to the starter
Mercedes Mechanic: Marty, Mercedes Technician replied 1 year ago

Yes the relay powers the purple wire. Have you replaced the relay yet?

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Mercedes Mechanic: Marty, Mercedes Technician replied 1 year ago

You can test for power to the relay by removing the relay and putting your voltmeter between terminal 85 and 86 in the relay box then turning the key and checking for 12V when the key is turned to the start position.

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Mercedes Mechanic: Marty, Mercedes Technician replied 1 year ago

Are you still with me?

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Customer reply replied 1 year ago
Ok I should have power on 85 and 86 when key is run position correct if not what's next
Customer reply replied 1 year ago
Is this starter relay 4 or 5 terminals making sure I am checking correct one
Mercedes Mechanic: Marty, Mercedes Technician replied 1 year ago

Your test is done with the key in the start position NOT in the run position.

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Mercedes Mechanic: Marty, Mercedes Technician replied 1 year ago

The starter relay is the green relay in the passenger side fuse and relay box under the hood.

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Mercedes Mechanic: Marty, Mercedes Technician replied 1 year ago

If you aren't getting 12V to the relay in the start position try disconnecting the electrical connector at the front of the transmission and see if it will start.

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Customer reply replied 1 year ago
do you have wiring diagram for starting system I bought a relay from local part but know luck
Mercedes Mechanic: Marty, Mercedes Technician replied 1 year ago

I have schematics but I cannot post them here. I can send them to your private email for an additional service fee. Did you try disconnecting the electrical connector at the transmission then try starting the car?

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Customer reply replied 1 year ago
that was a round plug but made know different would there be a different in the relay versus one from dealer
Mercedes Mechanic: Marty, Mercedes Technician replied 1 year ago

The starter relay is part number 002 542 76 19. As long as you purchased the correct part number it shouldn't make any difference. The usual problem on this model when you have no power to the starter is either a bad electrics plate in the transmission or a bad gearshift assembly or a bad transmission control unit. Basically the ECU does not get the message that the car is in park therefore it will not engage the starter.

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Customer reply replied 1 year ago
Ok it should start if car is placed in neutral or not is this also call neutral safety switch
Customer reply replied 1 year ago
When I start the car I should have 12 volts on pin 85 and 86 correct
Mercedes Mechanic: Marty, Mercedes Technician replied 1 year ago

Yes it should start in park or in neutral. When turning the key to the start position you should have 12V across 85 and 86.

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