Blower won't run

james ernst

New member
Dec 31, 2013
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Hello all,
I'm trying to get the blower to run. I replaced the relay on the firewall
with no go. I pulled out tw resistor assembly to check. Coils good but
holder is very corroded going to order one from Southern Camaro and
Firebird as the part is from a 69 Camaro.

I connected a wire directly to blower motor and it runs fine.

I found another relay above the normal relay. It looks like it got hot and
melted the connecto end of the pigtail. Didn't know there was another until
I traced a wire up there. Its Chevy pn 00366408. Its a compressor cutoff
relay/emmission control device for a Vega, wth?! Not sure I'll be able to
find one those. Anyone else with a 77 have that device, I haven't checked
my Kingsley yet.
Any thoughts or experiences out there?

Jim Ernst
Columbus, NE
77 PB
77 Kingsley
 
That’s the delay relay on 77-78s. They pop up on eBay for around $30, but you can bypass it. I believe it is the purple wire from that connector directly to the fan.

-Dave
Near Pittsburgh, 1978 Transmode

>
> Hello all,
> I'm trying to get the blower to run. I replaced the relay on the firewall
> with no go. I pulled out tw resistor assembly to check. Coils good but
> holder is very corroded going to order one from Southern Camaro and
> Firebird as the part is from a 69 Camaro.
>
> I connected a wire directly to blower motor and it runs fine.
>
> I found another relay above the normal relay. It looks like it got hot and
> melted the connecto end of the pigtail. Didn't know there was another until
> I traced a wire up there. Its Chevy pn 00366408. Its a compressor cutoff
> relay/emmission control device for a Vega, wth?! Not sure I'll be able to
> find one those. Anyone else with a 77 have that device, I haven't checked
> my Kingsley yet.
> Any thoughts or experiences out there?
>
> Jim Ernst
> Columbus, NE
> 77 PB
> 77 Kingsley
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
 
Thanks Dave, I was wondering if it could be bypassed. The plastic base is
melted around the center spade too. Yes it is the purple wire.

Thanks again,
Jim

On Tue, Aug 7, 2018, 6:09 PM Dave Stragand
wrote:

> That’s the delay relay on 77-78s. They pop up on eBay for around $30, but
> you can bypass it. I believe it is the purple wire from that connector
> directly to the fan.
>
> -Dave
> Near Pittsburgh, 1978 Transmode
>

> >
> > Hello all,
> > I'm trying to get the blower to run. I replaced the relay on the firewall
> > with no go. I pulled out tw resistor assembly to check. Coils good but
> > holder is very corroded going to order one from Southern Camaro and
> > Firebird as the part is from a 69 Camaro.
> >
> > I connected a wire directly to blower motor and it runs fine.
> >
> > I found another relay above the normal relay. It looks like it got hot
> and
> > melted the connecto end of the pigtail. Didn't know there was another
> until
> > I traced a wire up there. Its Chevy pn 00366408. Its a compressor cutoff
> > relay/emmission control device for a Vega, wth?! Not sure I'll be able
> to
> > find one those. Anyone else with a 77 have that device, I haven't checked
> > my Kingsley yet.
> > Any thoughts or experiences out there?
> >
> > Jim Ernst
> > Columbus, NE
> > 77 PB
> > 77 Kingsley
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
 
James

Here is something I posted years ago. It might help you.
this info is for the 1977 and 1978 models.

The delay relay is the smaller relay at the very top of the panel. It has two leads - on mine they are brown and yellow and one has a male and the other a female terminal at the end of the leads. The leads are approx. 6 to 8 inches long. The female one connects to the male terminal on the lead to the blower motor. The male one leads to the short lead (purple on mine) that goes to the blower relay (terminal 1). If the delay relay burns out you can plug the male motor lead directly into the short female lead going to terminal 1 on the blower relay.

The blower relay (below the delay relay but above the horn relay) has 5 terminals. When the blower relay is mounted with the 5 terminals down, there are two on the left, one in the middle and two on the right.

On the back left side it is #3 which has a red/white wire that leads to a fusible link and that goes into the harness and connects to the red wire from the alternator to the center stud of the battery isolator.

On the front left is terminal #2. Mine has a dark blue wire that leads to the resistor package in the right side of the heater box.

In the center is terminal #1. Mine has a short purple wire with a female connector. The male lead from the delay relay plugs into this (on mine right now I have the blower motor plugged into this as my delay relay is bad and disconnected).

On the right rear is terminal #5. This has a short black lead that goes to a ground screw.

On the right front is terminal #4. This has an orange wire that leads to the heater controls on the dash.

Terminals 4 & 5 control the coil in the blower relay.

Terminals 1 & 2 are normally closed and operate the blower when in low or medium speeds.

Terminal 1 & 3 are normally open but when the dash switch is put in "high" or "max" it actuates the coil and the relay connects these terminals which give power to the blower directly from the alternator in order to get higher voltage and higher blower speed. At the same time it disconnects terminal 2 from the circuit.
—————————————————————————————

Emery Stora
77Kingsley
Frederick, CO

>
> Hello all,
> I'm trying to get the blower to run. I replaced the relay on the firewall
> with no go. I pulled out tw resistor assembly to check. Coils good but
> holder is very corroded going to order one from Southern Camaro and
> Firebird as the part is from a 69 Camaro.
>
> I connected a wire directly to blower motor and it runs fine.
>
> I found another relay above the normal relay. It looks like it got hot and
> melted the connecto end of the pigtail. Didn't know there was another until
> I traced a wire up there. Its Chevy pn 00366408. Its a compressor cutoff
> relay/emmission control device for a Vega, wth?! Not sure I'll be able to
> find one those. Anyone else with a 77 have that device, I haven't checked
> my Kingsley yet.
> Any thoughts or experiences out there?
>
> Jim Ernst
> Columbus, NE
> 77 PB
> 77 Kingsley
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
 
Emery, thanks so much for your input, I appreciate it. I'm going to go
ahead and bypass the relay as you explained it in your message. I did find
one on EBAY for 40 bucks with shipping but why spend it if I don't need to.
Thanks again,
James E
Columbus, NE
77 PB

On Aug 7, 2018 7:25 PM, "Emery Stora via Gmclist"
wrote:

James

Here is something I posted years ago. It might help you.
this info is for the 1977 and 1978 models.

The delay relay is the smaller relay at the very top of the panel. It has
two leads - on mine they are brown and yellow and one has a male and the
other a female terminal at the end of the leads. The leads are approx. 6
to 8 inches long. The female one connects to the male terminal on the lead
to the blower motor. The male one leads to the short lead (purple on mine)
that goes to the blower relay (terminal 1). If the delay relay burns out
you can plug the male motor lead directly into the short female lead going
to terminal 1 on the blower relay.

The blower relay (below the delay relay but above the horn relay) has 5
terminals. When the blower relay is mounted with the 5 terminals down,
there are two on the left, one in the middle and two on the right.

On the back left side it is #3 which has a red/white wire that leads to a
fusible link and that goes into the harness and connects to the red wire
from the alternator to the center stud of the battery isolator.

On the front left is terminal #2. Mine has a dark blue wire that leads to
the resistor package in the right side of the heater box.

In the center is terminal #1. Mine has a short purple wire with a female
connector. The male lead from the delay relay plugs into this (on mine
right now I have the blower motor plugged into this as my delay relay is
bad and disconnected).

On the right rear is terminal #5. This has a short black lead that goes to
a ground screw.

On the right front is terminal #4. This has an orange wire that leads to
the heater controls on the dash.

Terminals 4 & 5 control the coil in the blower relay.

Terminals 1 & 2 are normally closed and operate the blower when in low or
medium speeds.

Terminal 1 & 3 are normally open but when the dash switch is put in
"high" or "max" it actuates the coil and the relay connects these terminals
which give power to the blower directly from the alternator in order to get
higher voltage and higher blower speed. At the same time it disconnects
terminal 2 from the circuit.
—————————————————————————————

Emery Stora
77Kingsley
Frederick, CO

>
> Hello all,
> I'm trying to get the blower to run. I replaced the relay on the firewall
> with no go. I pulled out tw resistor assembly to check. Coils good but
> holder is very corroded going to order one from Southern Camaro and
> Firebird as the part is from a 69 Camaro.
>
> I connected a wire directly to blower motor and it runs fine.
>
> I found another relay above the normal relay. It looks like it got hot and
> melted the connecto end of the pigtail. Didn't know there was another
until
> I traced a wire up there. Its Chevy pn 00366408. Its a compressor cutoff
> relay/emmission control device for a Vega, wth?! Not sure I'll be able to
> find one those. Anyone else with a 77 have that device, I haven't checked
> my Kingsley yet.
> Any thoughts or experiences out there?
>
> Jim Ernst
> Columbus, NE
> 77 PB
> 77 Kingsley
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org

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