rx350 second starter relay confirmation

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=137925
Printed Date: May 16, 2025 at 12:49 PM

Topic: rx350 second starter relay confirmation

Posted By: ptscon
Subject: rx350 second starter relay confirmation
Date Posted: December 10, 2014 at 10:28 AM

Hi guys,

I'll be installing a Prestige APS997E remote starter, excluding alarm, on my 2007 RX350. Just wanted to confirm my relay setup for the second starter wire.

The APS997E has a BLACK / YELLOW wire which provides ground during cranking. I believe I can use this to power the second starter wire on the RX.

86 - BLACK / YELLOW from R/S
85 - constant
30 - fused constant (20amp?)
87a - RX second starter
87 - unused

If this is correct, another question... Do I need to run the constant directly from the battery or can I tap into some wire under the dash.

Thanks :)

Replies:

Posted By: tedmond
Date Posted: December 10, 2014 at 12:13 PM

85 - BLACK / YELLOW from R/S
86 - constant fused with 15amp
87 - constant fused with 86
30 - RX350 second start wire.

you can use the same 12v source as the one you used for the main power to the brain.

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Ted
2nd Year Tier 1 Medical School
Still installing as a hobby...pays for groceries
Compustar Expert

Posted By: ptscon
Date Posted: December 10, 2014 at 4:49 PM

Much appreciated, I guess this is the diagram.

posted_image

What's the reason for fusing 86 if in theory there will only be minimal current going through it.

Posted By: tedmond
Date Posted: December 10, 2014 at 5:10 PM

to protect the relay, and the start circuit in the even there is a short.

-------------
Ted
2nd Year Tier 1 Medical School
Still installing as a hobby...pays for groceries
Compustar Expert