I have a Wolo 847 Siberian Express and 840 tank/compressor already mounted in spare tire well of my TrailBlazer. A buddy and I are going to wire it up within the week, but I have a few questions before we do:
- Do I need a relay? I keep reading alot in the forums about it, but isn’t it true that its unnecessary since the pull from switch to solenoid is less than quarter of an amp?
- Am I missing anything for a proper install?
Any help will be greatly appreciated
I don’t know what’s in that kit, but didn’t the compressor come with a relay?
The trigger wire is very low amperage, but the compressor itself could draw some decent juice. Did it come with a diagram?
I don’t have a Relay for my shocker S4 solenoid or my truck semi horn but it still wouldn’t hurt to put one in. As long as your Compressor has a relay with the correct amps to power it you shouldn’t have a problem.
My Shocker setup does not have a relay! I have a fused feed from the battery to the pressure switch, then from the pressure switch to the compressor.
I suppose a relay would not hurt, however I have had problems with relays arcing and sticking in the past.
I think I misread your question.
You do not need a relay for the horn solenoid.
I was also reading a little about that kit. They show the pressure switch on the tank and they say the compressor only draws 12amps. You might just run it like Stinky does - without a relay.
Man I hope you didn’t pay the prices I was looking at. LOL