What is the starter relay mod?

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What is the starter relay mod?

Postby 6strngs » Sat Jan 10, 2009 5:29 am

When I first bought my car I noticed a relay above the starter and wondered what it was. After browsing the forums for a while, I've seen the mention of a "starter relay mod" once or twice. I've done a search, but no luck. What I want to know is, how is this mod done, what problem is it fixing, and what real problem is it a "band-aid" for? At least to educate me so I know how it was done if I ever wanted to undo it, and so maybe I could fix the actual problem so I don't have some random relay sitting on top of my starter :doh:
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Postby Rick89GTS » Sat Jan 10, 2009 5:45 am

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Re: What is the starter relay mod?

Postby psipwrd » Mon May 25, 2015 2:04 pm

i'm replacing my starter for the 2nd time in a year. the car cranked intermittently before starter relay mod, and fine for about a year after. now it's intermittent and tapping the starter helps it crank. what could cause the starter to go bad so fast?
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Re: What is the starter relay mod?

Postby yyonline » Mon May 25, 2015 5:06 pm

psipwrd wrote:what could cause the starter to go bad so fast?


You didn't specify what you're replacing it with. A lot of the aftermarket rebuilders don't seem to do a very good job of rebuilding them. I had issues with Napa and Autozone starters on my Celica ST for years. I was replacing them every 1-2 years. I got fed up with that and rebuilt one of the rebuilds myself with Toyota parts. It's been fine since 2010 now.
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Re: What is the starter relay mod?

Postby entrax » Mon May 25, 2015 6:30 pm

the starter relay mod fixed an issue where the wire from ignition-start to the starter is too thin. over time/age, it doesn't allow for enough current going into the starter.

So instead of that wire firing up the starter, you instead run it to a relay. a relay will be much easier for the weak current to turn on/off. once the relay is energized, it allows for a strong (and hopefully safely fused) 12v signal straight from the battery to the starter.
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Re: What is the starter relay mod?

Postby Rick89GTS » Sun Jul 19, 2015 1:35 am

A lot of the old links I listed years ago are broken now but here is one to the http://www.st162.net link:
http://www.st162.net/forum/showthread.p ... r-Problems
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