Troubleshooting cooling fan

[DMC-Ron]

The connection near the washer bottle would be my guess for a bad connection causing it. But, like Dave,
I'd eliminate the rest first...Maybe get a couple of straight pins and pierce the ends of the Black/Green and Black/Orange wires immediately behind where the connectors crimp to the wire and take a reading.


Probably nothing, but just to be sure- In the 3rd pic, the Red wire in the fan fail socket goes to the meter's
probe lead, and, the meter's common connection is not in a pic. I.E. The Black wire shown is NOT going the meters common lead, but into the cooling fan relay socket from a previous test??

Sorry for not showing the full connections. The meter is "ohming" out the left fan wire. The meter's red lead is connected to the jumper wire inserted into the fan fail socket while the common lead is connected (via a long jumper) to the black/green pin of the disconnected fan connector at the front of car.

Ron

[Ron]

NP! ...you posted the meter and other end...I was hesitant to ask but ya never know...

Did you know the schematic you posted above is not like stock?

[DMC-Ron]

NP! ...you posted the meter and other end...I was hesitant to ask but ya never know...

Did you know the schematic you posted above is not like stock?

Odd, it was right from the DeLorean electrical schematic?? Are there other versions of the schematic? Or is the electrical schematic just incorrect for this specific circuit?
Ron

[Ron]

AH, now we're onto something....

BRB...

[DMC-Ron]

AH, now we're onto something....

BRB...

Here is the other schematic I have from the schematic documents of specific systems:
Cooling Fan Wire Schematic 02.JPG

The one I previously posted was from the large full-car schematic.

Ron

[Ron]

I've looked at A LOT of schematics and have never seen it any other way than this:

D Fan Circuit.jpg
(Click to enlarge)

[DMC-Ron]

AH, now we're onto something....

BRB...

EDIT:
I've look at A LOT of schematics and have never seen it any other way than this:

Attachment 54633
(Click to enlarge)

I agree that this one is clearer (and agrees with the second one I posted). The only large difference I immediately notice is that the full car schematic shows the right fan wire as Black/Orange. This is not correct for my car as both of my fan wires leaving the fan fail socket are black/green.

Ron

[Ron]

Yep, your car's Black/Green is like the one I just posted. The last one you posted has a Black/Orange feeding the Fan Fail (not the breaker, which isn't shown...) instead of Brown/Slate.

Where did you get that schematic? It's color so I know it isn't DMC LOL

[David T]

Yep, your car's Black/Green is like the one I just posted. Another difference is your's has a Black/Orange feeding the Fan Fail (not the breaker, which isn't shown...) instead of Brown/Slate.

Where did you get that schematic? It's color so I know it isn't DMC LOL

Get out your Workshop Manual and open it up to M:18:10. It is a really simple circuit.

[Ron]

Get out your Workshop Manual and open it up to M:18:10. It is a really simple circuit.

Me? ...It's wired the same as the one I posted.
J/K!
=============================


Ron, I think the first one IS ~DMC, remastered color...(How B/G got changed is a mystery ;-)
It also has the Fan Fail as 112, which is the Fan Relay.

The second one Sean made. (Shows B/O feeding Fan Fail.)
The one I use did have BO between the cooling fan and the breaker, instead of N/O.

I made notes/corrections where I could.
I can't verify since my D is getting a stage 2 engine courtesy of its new owner. Dave can for sure.
I'm still going with two straight pins...on the way to the washer bottle