On Thu, Jun 4, 2020 at 2:11 PM jamie@kookymathteacher.com <
jamie@kookymathteacher.com> wrote:

> Long time lurker here. I have a 1990 Vanagon, its not  a camper and no ac.

Never had a/c means you have the smaller fan giving two speeds with
internal resistor, and your high speed fan relay is in the fifth position
upper row on the fuse/relay panel.

> My radiator fan is not working. When I jump the fan with the plug that
> attaches to the radiator fan switch, the R/Bk wire makes the fan work

So low speed normal.

> and the R/Bl wire blows #1 fuse.

Short to ground on either the relay control line (red/blue to panel H6) or
the high fan power lead (red from panel H1 to the three pin fan connector.

> I have replaced the Radiator fan. In the Bentley schematics and in my
> vehicle
> I don’t see a Low speed radiator fan resistor. I do see a second stage
> radiator cooling relay. Could a bad relay cause a fuse to blow? Thanks.
>

Not completely impossible for a broken relay to short to ground; but very
unlikely.

Pull the relay.  If the short goes away it's the red wire from panel to fan.

Yrs,
d

>
> -Jamie Auch
>
>
> Sent from my iPhone