Bow_Extreme 544 #1 Posted January 13, 2016 For those of you who suffer from relay issues with your 520's and other models I believe I have a more permanent solution for you. The relays used in the 520's are Hella 960 388-07. These are somewhat of an openstyle relay at the connector side. The connector is also open and can fill with debris, short out, and degrade to a non-working condition. You should be able to order the following part numbers to replace your relays and female connectors. Hella Weatherproof Skirted Relay: HL87411 Hella Weatherproof Female Connector w/12" pigtails: HL87173 Solder in the female connector to your current wiring and replace the non weatherproof relay with the weather proof relay and your back in business. Engine Harness: Clip the old harness connectors from your wiring harness. Go to Napa and buy yourself a 4 pin square trailer connector and a 6-Pin(You can get a 5 Pin) rectangular trailer connector for a total of $9-10. Solder in the connector wiring pigtails, shrink wrap, pack the connector full of dielectric grease and your ready to roll again. They are far better than the 9-Pin connector you can purchase as they are sealed connectors when your done. These items take a little time to solder in or you could use crimp connectors(recommend the shrink style connectors if your going to use them) and be in business in a little shorter time. This should help those of you who are using your tractors in this winter weather and help keep your electronics high and dry and your tractor running strong!! I also posted on another topic a while back regarding the fuse block issues. You can simply purchase sealed inline fuses and solder these into your current wiring, throw in the 15,25, & 30 amp fuses, throw away the open fuse block, and never worry about fuse issues again. Pics Attached for reference. 10 Share this post Link to post Share on other sites
cheesegrader 433 #2 Posted January 13, 2016 (edited) I've already replaced the fuse block on most of my tractors. The 9-pin connector and relays are the remaining weak links. I am going to add these projects to my spring tune-up list. I never heard of weatherproof relays. Learn something new every day. Where did you find them? Thanks for the information. Edited January 13, 2016 by cheesegrader Share this post Link to post Share on other sites
KC9KAS 4,742 #3 Posted January 13, 2016 @Bow_Extreme thanks for the information! Share this post Link to post Share on other sites
Bow_Extreme 544 #4 Posted January 13, 2016 12 hours ago, cheesegrader said: I've already replaced the fuse block on most of my tractors. The 9-pin connector and relays are the remaining weak links. I am going to add these projects to my spring tune-up list. I never heard of weatherproof relays. Learn something new every day. Where did you find them? Thanks for the information. You can find the relays in many places online. I order mine from Susquehanna MotorSports (www.rallylights.com) But you can cross reference to many other types such as Bosh & Tyco. You can also buy from Napa or other Automotive parts stores as these relays are used in many applications of similar nature. All depends on cost at each location. Share this post Link to post Share on other sites
WHX?? 49,894 #5 Posted January 18, 2016 Good info here on the "if you don't have them your are gonna" wiring proplems on the 520, Thanks Bow Share this post Link to post Share on other sites
Cable 179 #6 Posted April 17, 2016 Glenn Pettit makes a plastic cover that snugly fits over the 4 slot fuse block on the 520s. Keep the fuse block clean. If it feels hot you may have time to replace the contact before it melts the block. One solution for the 9-Pin is to replace the two red wire contracts with gold plated ones. Share this post Link to post Share on other sites
DennisThornton 4,770 #7 Posted March 12, 2018 Might these be options? https://www.ebay.com/p/2215892977?trdt=0&iid=322945025669&rt=nc https://www.ebay.com/itm/John-Deere-12V-5-Terminal-Sealed-Waterproof-Replacement-Relay-AL208597-/401280549913?_trksid=p2385738.m4383.l4275.c10 Share this post Link to post Share on other sites
dburu2 1 #8 Posted May 6, 2018 So new to this forum bought my 520H in 97 have had a few problems over the yrs but figured them out have a starter issue new starter pushes the gear out but won’t spin it to turn flywheel even on the bench same thing is this a relay issue or the new starter is bad? Thanks for the help Share this post Link to post Share on other sites
squonk 41,912 #9 Posted May 6, 2018 Those relays are common in late 90's and up GM cars. I go to the local pick you pull junk yard and grab a handfull when I need them. Clip the plug with it. Share this post Link to post Share on other sites
WHX?? 49,894 #10 Posted May 7, 2018 dburu I would suspect you might have some thing going on it the atarter. Share this post Link to post Share on other sites
