Way to bypass a relay?

[CalG]

Be careful with installing a Bosch cube style automotive relay. They are typically rated at 30-Amps.

The starter will pull 100 to 300-amps. And, could easily burn out the contacts on a standard automotive relay.

Look for a starter relay, with a high enough Amp capacity to handle your starter.

This, or something similar. https://www.amazon.com/gp/aw/d/B08F28SKX1/?_encoding=UTF8&pd_rd_plhdr=t&aaxitk=8d28fdd4a5c32db17fdb14eb94f0cd58&hsa_cr_id=3677317210701&qid=1747452286&sr=1-2-9e67e56a-6f64-441f-a281-df67fc737124&ref_=sbx_be_s_sparkle_dlcd_asin_0_title&pd_rd_w=tMLc4&content-id=amzn1.sym.8591358d-1345-4efd-9d50-5bd4e69cd942:amzn1.sym.8591358d-1345-4efd-9d50-5bd4e69cd942&pf_rd_p=8591358d-1345-4efd-9d50-5bd4e69cd942&pf_rd_r=5ANAAWA00CZ73T4RQ5MG&pd_rd_wg=R6CzW&pd_rd_r=f2416631-751a-4bfa-b069-9fb584d0980b&th=1

THIS IS VERY IMPORTANT!

 

[mrmikey]

Be careful with installing a Bosch cube style automotive relay. They are typically rated at 30-Amps.

You are correct for sure but I'm pretty sure the original relay would be used to control the starter relay. There'd be no way to physically get 1-200A contacts into that small of a package. I'm thinking just to pull the starter relay contacts in you're probably in the 4-10A range, something they wouldn't want to put thru an ignition switch. These are just my thoughts from years of screwing around engines so I stand to be corrected.

 

[Mike1955]

Wire size on the component should be indicative to the amp draw

 

[WranglerX]

Be careful with installing a Bosch cube style automotive relay. They are typically rated at 30-Amps.

The starter will pull 100 to 300-amps. And, could easily burn out the contacts on a standard automotive relay.

Look for a starter relay, with a high enough Amp capacity to handle your starter.

This, or something similar. https://www.amazon.com/gp/aw/d/B08F28SKX1/?_encoding=UTF8&pd_rd_plhdr=t&aaxitk=8d28fdd4a5c32db17fdb14eb94f0cd58&hsa_cr_id=3677317210701&qid=1747452286&sr=1-2-9e67e56a-6f64-441f-a281-df67fc737124&ref_=sbx_be_s_sparkle_dlcd_asin_0_title&pd_rd_w=tMLc4&content-id=amzn1.sym.8591358d-1345-4efd-9d50-5bd4e69cd942:amzn1.sym.8591358d-1345-4efd-9d50-5bd4e69cd942&pf_rd_p=8591358d-1345-4efd-9d50-5bd4e69cd942&pf_rd_r=5ANAAWA00CZ73T4RQ5MG&pd_rd_wg=R6CzW&pd_rd_r=f2416631-751a-4bfa-b069-9fb584d0980b&th=1

Typical a starter relay is used to operate the solenoid on starter I have grave and serious doubts a solenoid draws 100-300 amps to operate..... But then the solenoid has a contact set that can handle the 100-300 amps the starter motor needs to spin up....

Lets not miss comprehend relays and solenoid functions.... Diagram is typical but not absolute as manufactures use some different variations...

 

[CalG]

Perhaps a better way to phrase the warning is that these cube style relays do come in various current carrying ratings.

Choose the rating that is correct for your application for best results.

I've got a box of them out in the shop....;-)

 

[dstig1]

I don't see that the OP says it is a starter relay, but most seem to be assuming that. Do we actually know this to be true?

 

[WranglerX]

IF you read post #1 again the buzz word phrases are "needs relay" and "to start tractor"... Makes one guess its a "starter relay"....

 

[toot77]

The relay (SBA385230220) referenced in the OP's question does not carry starting motor current. SBA385230220 is commonly referred to as a safety start or neutral start relay. The NO contacts of this relay is in series with the ignition switch which energizes the starter solenoid. The coil of SBA385230220 is energized by limit switches which must all be closed in order for the starter to operate, i.e. clutch pedal & pto's, etc..

A standard Bosch type automotive relay is adequate for this application and has been in place and working as a replacement on my 1520 for about 5 years now. Due to the different terminal configuration I also changed the relay's socket. The SBA385230220 terminals are labeled so I just moved the two wires that were connected to the terminals labeled 'COIL' to my replacement relay terminals 85 & 86, and moved the wire on 'COM' to 30, and 'NO' to 87. I did not cut, splice, or change the oe spade connectors on any of the wires.

 

[Williy]

If it was me I would take the relay apart clean the contacts
solder the contacts with silver solder file them smooth

willy

 

[Dftodd]

I haven't read the whole thread. But the auto parts store sells relays. So you may be able to take the relay into the store and match it up.

They also sell relay bases as well.

I had a piece of equipment that had relays built into a fuse block and the relay portion of the fuse block rusted out.

I just looked up the diagram for the relay in the fuse block so I could figure out how to wire up the after market relay and base I purchased from the auto parts store.