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"....