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Fu3 blows Immediately

Arrived on site yesterday unit died pulling out of loading dock no power. replaced fu3 unit ran good beat on it hard for 20 mins returned to service. Called back out today same issue pulling out of loading dock unit died has no power went to replace fuse and it blew the second I turned key switch on. Operators manual doesn't show diagrams for pdi anyone have ideas where to look for shorts or what components to check.
  • Posted 8 Aug 2024 01:22
  • By Brennon_Skelton
  • joined 8 Aug'24 - 1 message
  • Minnesota, United States
Bs
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Fu3 protects the key switch and everything past it. It is possible that the K1 or K2 relay has a short in it causing it to blow right away. The next part in the circuit is the brake switch and accessory switches. Make sure to turn them off and release the brake to eliminate those as causes. Otherwise TP8, 9, 3, and 4 are good point to test if there is a short on the distribution board.
  • Posted 23 Aug 2024 01:16
  • By DyslexicNerd_01
  • joined 13 Jun'23 - 225 messages
  • Wisconsin, United States
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Fact of the week
Foundling hatches are safe, anonymous drop-off points for unwanted infants, allowing parents in crisis a way to surrender a baby safely without fear of punishment, ensuring the child is rescued and cared for. The concept started in the 12th century, was abandoned in the late 19th century, then reintroduced in 1952. It has since been adopted in many countries.