Diagnose and Test Fan Wiring

compared to that. I do n't like any of this at all. All this wiring looks terrible. There's not much you can do here, other than a huge amount of tidying up, because this factory harness was converted to stand -alone in a place that's not very convenient, to say the least, and they either left it the same length it was in the truck in an inconvenient place, or they lengthened something so much that you have to roll it up to get it out of the way where it's not needed. For example, all these injector blocks — there's so much extra dirt there that's simply not needed. We need to cut it all out, change it, and so on . But here, where the bulk of the wires are, they leave everything as is. So you have to put the control unit roughly where it was in the truck relative to the engine. Couldn't it have been extended so that it could be hidden under the dashboard or somewhere else? That would be too logical. Logan goes to electrician school. So when we build Uncle George, I can say, " Hold on, can you turn on the electricity ?" And then you can connect the electricity . Did you clamp it from above, sideways, like this ? Oh, yes. And you can adjust this thing to determine how much insulation it will remove. So you can slide it into that yellow thing. Yes. These little workshop lights have these tails that come out here, and we need to extend them so we can use one outlet instead of two for another machine. I ran the ground with a thicker wire to the old location under the radiator, and found the second fan wire that was coiled and tucked away. So I unwound it. And I'm not going to leave it like that . This is just a bench test: will it turn on if I turn the key, because I don't know if the ECU is set to command both fans to turn on when it turns on the one that was working before, because there was only one fan. I don't know what the settings are on the computer. So we'll just leave it at that for a second. I'll turn the key and see if anything happens. Well, none of the fans turned on. So, I don't know what to think about this . I think we'll just plug everything in and hope for the best. What I found out is that the heat exchanger pump is working because it is being pumped along with the fuel pump. So the heat exchanger pump relay is probably connected to the fuel pump operation. So, if the fuel pump is working,