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2005 RX8 no crank. Relay is good. I have 12 power to the…

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2005 RX8 no crank...

2005 RX8 no crank. Relay is good. I have 12 power to the LG/R in the fuse box with the ignition switch in the start position. I also have power to the red wire in the at the relay. But no voltage gets to the solenoid.

Mechanic's Assistant: Thanks. Can you give me any more details about your issue?

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Submitted: 2 years ago.Category: Mazda
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Answered in 25 minutes by:
1/30/2016
Mazda Mechanic: piciu82, Technician replied 2 years ago
piciu82
piciu82, Technician
Category: Mazda
Satisfied Customers: 109
Experience: 3 years in import car technician
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is it stick or automatic ?

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Customer reply replied 2 years ago
stick
Customer reply replied 2 years ago
Hello?
Mazda Mechanic: piciu82, Technician replied 2 years ago

check for ground on White / Green wire,

PCM anti theft controls that relay by sending ground to control terminals , if key is not recognized it will not crank, did you tried to jump relay to force it to crank ?

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Customer reply replied 2 years ago
No I did not check for ground at the white and green wire. I checked continuity of the wire, from the fuse box to the relay, it is good. The key is recognized by the PCM, because the immobilizer light turns on, then goes off. The starter cranks the engine when I do it manually. I will check for the ground. and reply.
Customer reply replied 2 years ago
In the run position, I get 64 ohms, in the off position I get 34 ohms ant the W/G wire.
Mazda Mechanic: piciu82, Technician replied 2 years ago

you have to check it different way, you need regular test light, connect it to positive side of battery. remove starter relay and connect test light to terminal with white / green wire, try to crank it with the key, if test light light up PCM is commanding relay

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Customer reply replied 2 years ago
Okay
Customer reply replied 2 years ago
Test light illuminated in the start position. Reinstalled relay, tested L/R wire at the starter in the start position with my test light, light did not illuminate.
Customer reply replied 2 years ago
Are you still there?
Mazda Mechanic: piciu82, Technician replied 2 years ago

did you check continuity between starter solenoid and relay ?? so far what you tested indicates that there's power to the relay, relay control circuit is good and working, now try to jump relay terminals (RED and BLUE/RED) Red is power to the relay from fuse box (ACC fuse) blue/red Is power from relay to starter solenoid

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Mazda Mechanic: piciu82, Technician replied 2 years ago

Diagram

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Customer reply replied 2 years ago
I jumped the connection and nothing happened. Checked continuity from blue and red terminal in fuse box to terminal at starter no continuity. That is as thick wire, how could it be broken. Have you seen anything like this before?
Customer reply replied 2 years ago
Pulled the harness from the starter, did wiggle test and suddenly got continuity through out the entire L/R circuit. Is the a know problem with this harness are fuse box. The starer cranked the engine. Any suggestion?
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