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  #16  
Old 05-26-2009, 08:48 PM
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Re: How To Do the Bosch Relay Mod???

Quote:
Originally Posted by dannmarr View Post
Here is another diagram and a photo of the installation.
#30 positive
#86 negative
#87 starter
#85 to wire that was removed from starter
The supply for the relay is best obtained by making a connection at the main starter terminal, which is connected direct to the battery. Otherwise an extra wire, not protected by a fuse will have been introduced.
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Last edited by Trevor; 05-26-2009 at 08:53 PM.
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  #17  
Old 05-27-2009, 04:49 AM
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Re: How To Do the Bosch Relay Mod???

Do you happen to have the part number of this relay? Do Autozone or Advanced autoparts carry it?
BTW What size of wire(AWG) do you use?
Thanks

Quote:
Originally Posted by dannmarr View Post
Here is a write up with photos;
http://svx-iw.com/svxiw/article/?article=196
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  #18  
Old 05-27-2009, 04:50 AM
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Re: How To Do the Bosch Relay Mod???

Thanks a lot everyone!!!
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  #19  
Old 05-27-2009, 05:10 AM
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Re: How To Do the Bosch Relay Mod???

Quote:
The supply for the relay is best obtained by making a connection at the main starter terminal, which is connected direct to the battery. Otherwise an extra wire, not protected by a fuse will have been introduced.
Yes, this is a great idea. I believe Harvey mentions this in his diagram. Thanks.

Last edited by dannmarr; 05-27-2009 at 05:14 AM.
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  #20  
Old 05-27-2009, 05:17 AM
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Re: How To Do the Bosch Relay Mod???

Quote:
Originally Posted by pearlm30 View Post
Do you happen to have the part number of this relay? Do Autozone or Advanced autoparts carry it?
BTW What size of wire(AWG) do you use?
Thanks
I don't have the part number, it's a 30 amp relay
and I used 12 gauge stranded wire.
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  #21  
Old 05-27-2009, 07:00 AM
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Re: How To Do the Bosch Relay Mod???

I plan to employ this setup for my Ebony during my inspection and replacement of any deteriorated wiring. I also will install it on Jon's Laguna before we take the car on any trips this summer.

I did experience a similar start issue with my Claret, but when I was checking wiring during the engine swap I found a crimp in the battery cable. Once I replaced these wires, I no longer had the problem. I will most likely install the relay anyway once I redo my alternator wiring.
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  #22  
Old 05-27-2009, 09:12 AM
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Re: How To Do the Bosch Relay Mod???

Quote:
Originally Posted by Starter relay bypass installation, Author: Dannmarr
ALERT! With this installation, DO NOT shift into park or neutral while the cruise control is activated. The cruise control is grounded through the starter and will activate the relay and starter again! Just remember to deactivate the cruise control before you use park or neutral.
Surely, there's a way around this.
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  #23  
Old 05-27-2009, 11:06 AM
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Re: How To Do the Bosch Relay Mod???

Quote:
Originally Posted by pearlm30 View Post
Do you happen to have the part number of this relay? Do Autozone or Advanced autoparts carry it?
BTW What size of wire(AWG) do you use?
Thanks
Advance had 30 amp relays part # 84601 Conduct Tite brand. (no bosch)

I also picked up a 30 amp inline waterproof fuse holder made by Bussman

edit: is the 30 amp fuse necessary if you connect at the starter terminal for power?
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Last edited by immortal_suby; 05-27-2009 at 11:46 AM.
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  #24  
Old 05-27-2009, 12:25 PM
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Re: How To Do the Bosch Relay Mod???

Just finished installing it. Works great! Thanks guys.
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  #25  
Old 05-27-2009, 02:12 PM
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Re: How To Do the Bosch Relay Mod???

So where did you get your power? Do you ended up with a 30 amp fuse?
Thanks


Quote:
Originally Posted by immortal_suby View Post
Advance had 30 amp relays part # 84601 Conduct Tite brand. (no bosch)

I also picked up a 30 amp inline waterproof fuse holder made by Bussman

edit: is the 30 amp fuse necessary if you connect at the starter terminal for power?
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92 Claret WRX 5 speed ECUTune 1AV1 Gold STI Wheels & more. SOLD
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92 Black SVX LSL with B&M cooler & Aux filter. Small Car Shift Kit. Gone
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  #26  
Old 05-27-2009, 03:08 PM
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Re: How To Do the Bosch Relay Mod???

Quote:
Originally Posted by immortal_suby View Post
Advance had 30 amp relays part # 84601 Conduct Tite brand. (no bosch)

I also picked up a 30 amp inline waterproof fuse holder made by Bussman

edit: is the 30 amp fuse necessary if you connect at the starter terminal for power?
No you do not then need the fuse. The relay coil would safely burn out if there were shorted turns and the location is safe.

In any event, a 30 amp fuse would not protect the relay or a light wire, as is only required for a connection to the battery. Any fuse fitted should be as close as possible to the battery end of the wire. I note from where this strange specification originated. Perhaps it was assumed that the relay draws 30 amps.
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  #27  
Old 05-27-2009, 05:14 PM
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Re: How To Do the Bosch Relay Mod???

Quote:
Originally Posted by LetItSnow View Post
Surely, there's a way around this.
That was a problem that some found, when they used a relay that had a high resistance winding that could be energized by the Cruise Control Deactivation circuit that uses the starter solenoid to turn off the Cruise when P or N is selected.
As long as the type of relay is a 30 amp and has a armature winding resistance, of about 100 Ohms or less, you will not have a problem.

Harvey.
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  #28  
Old 05-27-2009, 06:02 PM
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Re: How To Do the Bosch Relay Mod???

Quote:
Originally Posted by oab_au View Post
That was a problem that some found, when they used a relay that had a high resistance winding that could be energized by the Cruise Control Deactivation circuit that uses the starter solenoid to turn off the Cruise when P or N is selected.
As long as the type of relay is a 30 amp and has a armature winding resistance, of about 100 Ohms or less, you will not have a problem.

Harvey.
Do not ask for a relay with certain "an armature winding resistance", as there is no such animal. The armature comprises the moving magnetically attracted part of a relay. Coil resistance, is the usual term.
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  #29  
Old 05-27-2009, 07:15 PM
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Re: How To Do the Bosch Relay Mod???

Quote:
Originally Posted by pearlm30 View Post
So where did you get your power? Do you ended up with a 30 amp fuse?
Thanks
I got power from the starter, at the 12mm nut.
I did not use the fuse, as Trevor noted it is not needed if you get power there.
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  #30  
Old 05-30-2009, 04:29 PM
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Re: How To Do the Bosch Relay Mod???

It's staggering how awesome it feels to be able to turn the key one time and have the engine turn... every time. This should surely be on the <$100 Mod List, possibly one of the first things that should be done to a newly-bought SVX, and likely a kit-worthy project, if proper wiring can be agreed to.

I put my relay on the cruise control bracket as shown elsewhere, but I grounded it to the bolt that holds it in place. The multitester showed the mounting threads and the battery ground to have practically no resistance, and it works fine.

No more snickering for my Subaru comrades around town!
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