Hi, I'm working on 24vdc system on a backhoe, I replace the module for the 4wd system. The module activate a solenoid on spool valve. Everything works fine but when I shift gear the output of my module turn off and back on in a second. The shifter is all electronic it activate solenoid on the transmission/transfer case assembly. The only link between the two circuits is the power supply, they share the same fuse, I try to supply a positive and negative from the batteries but no difference. When I disconnect the solenoid from the transmission the problem goes away in which gears it disconnected my 4wd solenoid and transmission solenoids are wired separately. I'm in a dead end and need new ideas. Thanks.