V1 Intercooling fan and car not shutting off...

[Jammerthal]

So as I wrapped up a lot of the electrical on the car I noticed that when I would turn the key off the car would take longer to shut down, meaning the engine would run sometimes with the key totally out. Thought maybe something was catching in the ignition etc but couldn't figure it out. I also wasn't sure if my radiator fan was turning on because the intercooler fan would turn on as soon as I turn on the ignition, and I couldn't tell if the radiator fan kicked on. Tonight I unplugged the intercooler fan to test if the radiator fan was kicking on. When I shut the car off it turned off normally and didn't run with the key out. So I plugged the intercooler back in and sure enough the car will keep running with the key out for anywhere between 5 to 20 seconds. Anyone else run into this? Any ideas on how to prevent it? Also, some of the labeling came off, but I believe the sky blue wire is the one for the radiator. At what temperature should I expect to see that kick on? Thanks everyone

 

[Gtstorey]

Do some digging on here. It's a common problem with the fan generating voltage to keep the ignition powered. Needs a diode (I think that is the correct item).

 

[duthehustle93]

Do some digging on here. It's a common problem with the fan generating voltage to keep the ignition powered. Needs a diode (I think that is the correct item).

Correct, you need a diode on your intercooler fan, there's a few threads on it. I used this one. https://www.amazon.com/dp/B0BVV3XXDW?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1

 

[KSLunsfo]

I just allow it to serve as a short duration turbo timer lol.

 

[Robinjo]

I had to buy a few more recently because I gave them all away. PM your address and I can send you one.

 

[Jammerthal]

I had to buy a few more recently because I gave them all away. PM your address and I can send you one.

Very kind of you Robinjo!!
I'll grab some off Amazon. Does this go on the positive side of the fan? It's there a direction it needs to go?

 

[Desert Sasqwatch]

Think of a diode as a one-way valve for electricity. In the positive wire, current will flow in the direction of the arrow marked on the part, so it needs to be pointing at the fan/pump. Current is blocked going against the flat bar on the diode, to prevent the fan/pump from being a generator to backfeed the positive circuit.

 

[Robinjo]

Very kind of you Robinjo!!
I'll grab some off Amazon. Does this go on the positive side of the fan? It's there a direction it needs to go?

Yes, this is the direction you need to go. Mine did the exact same thing (as have many others) and the diode fixed the issue.