Mr_Mudney Posted March 29, 2021 Report Share Posted March 29, 2021 Working on squashing the electrical bugs on my 79 620. I know the brake switch, hazard switch, and horn are all on the same circuit. None of them are working, but the fuse is not blown. While testing I see I am getting voltage to each switch but when any are activated the voltage drops to 0 on the entire circuit. Electrical is not my strong suit so any help with this would be very appreciated. Quote Link to comment
datzenmike Posted March 29, 2021 Report Share Posted March 29, 2021 Hold a quarter across the clips to power around the fuse. Leave the 4 ways ON and they should start flashing. 15 amp fuse might be loose, I would replace it 1 Quote Link to comment
Mr_Mudney Posted March 29, 2021 Author Report Share Posted March 29, 2021 You never cease to amaze me datzenmike, it works. The fuse is new, but I’ll try cleaning up the connections. Thanks for all you do! 1 Quote Link to comment
datzenmike Posted March 29, 2021 Report Share Posted March 29, 2021 90% of all electrical problems are caused one way or the other by... the fuse box. The 620 fuse box is easy enough to unplug and remove. Fill a suitable container with lemon juice and dissolve a few teaspoonfuls of table salt in it. Wash the box in soapy water and use an old toothbrush to scrub it clean, rinse and submerge the box overnight in the lemon juice, rinse and dry on the morning. https://www.marthastewart.com/270759/polishing-copper 1 Quote Link to comment
banzai510(hainz) Posted March 29, 2021 Report Share Posted March 29, 2021 most time its just corrossion on contacks. Real bad on 521s or fuse is broke on insside enought to read with ohm meter but wont carry a load Quote Link to comment
FrankRizzo Posted March 30, 2021 Report Share Posted March 30, 2021 Also _ i was able to buy a brand new NOS Niles fuseblock on Ebay a few years ago, it looks like there are still a few available. https://www.ebay.com/itm/DATSUN-620-J13-J15-FUSE-BOX-PICKUP-TRUCK/203261908334?hash=item2f535a956e:g:bH0AAOSw3WZgEm~q https://www.ebay.com/itm/For-NISSAN-FUSES-BOX-GENUINE-OEM-NILES-DATSUN-620-U620-1500-PICKUP-TRUCK-72-79/170782048577?fits=Make%3ADatsun&hash=item27c3674141:g:0FMAAOSwBRlcclTX ... Quote Link to comment
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