Starter relay location

Tiny
RENAV
  • MEMBER
  • 2004 TOYOTA SIENNA
  • 299,100 MILES
Will not start, or crank over. Lights and electrical work. Battery tested to be at 12.3 volts. No issues with starter. Thinking it may be starter relay, or something to do with the keys or alarm system.
Monday, October 8th, 2018 AT 6:33 PM

5 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
Hi and thanks for using 2CarPros.com.

The relay is in the passenger compartment fuse/relay box. I attached a picture of what you are looking for. In the picture, it is identified as the ST relay.

As far as the no crank, it could be a few issues. Simple things such as a corroded or loose battery terminal, neutral safety switch can cause this. Also, you mentioned the starter is good. Has it been checked? Have you checked to see if there is power to the smaller wire on the starter when the key is in the start position? If there is no power, a relay or fuse can be an issue. If there is power, the starter is bad.

Take a look through these links. It shows how to check for proper power to the starter, how to check a relay, how to check the battery terminals.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

https://www.2carpros.com/articles/starter-not-working-repair

https://www.2carpros.com/articles/everything-goes-dead-when-engine-is-cranked

Let me know if any of this helps or if you have other questions.

Take care,
Joe
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Monday, October 8th, 2018 AT 7:15 PM
Tiny
DUHCIDER
  • MEMBER
  • 2 POSTS
My van does the same. Simply will not engage starter or crank at 12.3 V or below. Quick charge or jump starts right up.
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Saturday, January 1st, 2022 AT 6:30 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
Hi,

Anytime the vehicle requires a jump or charge leads me to think there is a connection issue at the battery. Those are the terminals that would be touched when doing either. Are they tight and clean?

https://www.2carpros.com/articles/everything-goes-dead-when-engine-is-cranked

Let me know. Also, do me a favor. Have a helper crank the engine (when it isn't working properly) while you watch the battery voltage. Let me know how far it drops. Also, when you have the voltmeter on the battery to test, make the connection on the battery cables and not the actual battery posts.

I will watch for your reply.

Take care,

Joe

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Saturday, January 1st, 2022 AT 10:37 PM
Tiny
DUHCIDER
  • MEMBER
  • 2 POSTS
Well, you pretty much nailed it. All my fiddling around checking this and that while hypothesizing a unifying theory, I overlooked a truly basic and fundamental component. Yup Petrol. Just kidding. The water in the batteries had been neglected for quite some time. Air, Fuel, Spark and Water. Lol ! Let this be a lesson. You are never too old to be a space cadet !

Thanks for getting back Joe!
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Sunday, January 2nd, 2022 AT 1:43 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
Hi,

First, I'm glad to hear you got it figured out. Second, we all do the same kinds of things. LOL It happens to the best of us.

Regardless, I'm glad it's fixed. Please feel free to come back anytime in the future if you have questions. You are always welcome here.

Take care and Happy New Year,

Joe
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Sunday, January 2nd, 2022 AT 6:16 PM

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