Water temp sending unit - The 1947 - Present Chevrolet & GMC Truck Message Board Network

woody96 · 03-30-2005, 08:48 PM

Where is the water temp sending unit on a 305? I recently bought an 84 c10, (couldn't help it, added a pix )

silverado with the upgraded instruments with the water temp gauge, and it is not registering at all.......

pedrofixlater · 03-30-2005, 09:04 PM

the 305's temp sending unit is on the left head by plugs 3 and 5

pedrofixlater · 03-30-2005, 09:10 PM

oh ya nice looking truck

woody96 · 03-30-2005, 11:10 PM

THX, I'll sure look for it there..........

woody96 · 03-30-2005, 11:46 PM

Arghhh! Found the sending unit on the drivers side as you said....there is NO wire there, nothing!!!

Just the sender........Any ideas as to what I should do next? Help.....!

woody96 · 03-31-2005, 12:47 AM

As I said, found the temp sender, but NO WIRE---NOTHING but the sender sitting there....didn't see a grn wire hanging anywhere either (haynes diagram shows a green wire for this sender).........any help here would be greatly appreciated to get this hooked up and working.......again, it is a silverado with the better cluster with temp gauge.......

ureckme · 03-31-2005, 01:20 AM

It's a wire that runs to the main harness on the fire wall. On my truck theres more than one green wire. A/c, fast idle, and temp sender run down the left side of the engine next to the carb and valve cover. some of them run down the block under the Exhost manifold. It could have fallen down the back of the engine. The wire comes out of the harness above the dist. ( on my truck ). when you find the wire ground it out and your gauge should move to hot. Matt

pedrofixlater · 03-31-2005, 07:58 AM

As you said there should be a dark green wire in the main harness that is hooked up to nothing. As mat said there may be more than one. Find it ground it and gauge will max out. Pete

woody96 · 03-31-2005, 09:33 AM

THX guys! Appreciated......I hope its there, this 305 has been rebuilt with a cam and such, and non-environmental Edelbrock 1406 carb (no emissions stuff anywhere), so I hope that the wire is there somewhere.......I am finding some things not hooked up or just laying there from the engine transplant.....UGH!!!!!

woody96 · 04-01-2005, 11:00 AM

THANKS for the great scoop guys....found the wire/lead hanging off of the side of the drivers side manifold....touched to ground and the gauge pegged....then hooked it up where it needs to be!!!

[B]AWESOME help here.....GREAT board, I appreciate it!

03-30-2005, 08:48 PM	#1
woody96 Registered User Join Date: Jan 2005 Location: Chapin, SC Posts: 392	Water temp sending unit Where is the water temp sending unit on a 305? I recently bought an 84 c10, (couldn't help it, added a pix ) silverado with the upgraded instruments with the water temp gauge, and it is not registering at all....... __________________ "Fighting for our freedoms....."

03-30-2005, 09:04 PM	#2
pedrofixlater 75 STEPSIDE Join Date: Mar 2005 Location: Suffolk, VA Posts: 92	the 305's temp sending unit is on the left head by plugs 3 and 5 __________________ Pete 75 Chevy Stepside 70 Buick Skylark/GS

03-30-2005, 09:10 PM	#3
pedrofixlater 75 STEPSIDE Join Date: Mar 2005 Location: Suffolk, VA Posts: 92	oh ya nice looking truck __________________ Pete 75 Chevy Stepside 70 Buick Skylark/GS

03-30-2005, 11:10 PM	#4
woody96 Registered User Join Date: Jan 2005 Location: Chapin, SC Posts: 392	THX, I'll sure look for it there.......... __________________ "Fighting for our freedoms....."

03-30-2005, 11:46 PM	#5
woody96 Registered User Join Date: Jan 2005 Location: Chapin, SC Posts: 392	Arghhh! Found the sending unit on the drivers side as you said....there is NO wire there, nothing!!! Just the sender........Any ideas as to what I should do next? Help.....! __________________ "Fighting for our freedoms....."

03-31-2005, 12:47 AM	#6
woody96 Registered User Join Date: Jan 2005 Location: Chapin, SC Posts: 392	As I said, found the temp sender, but NO WIRE---NOTHING but the sender sitting there....didn't see a grn wire hanging anywhere either (haynes diagram shows a green wire for this sender).........any help here would be greatly appreciated to get this hooked up and working.......again, it is a silverado with the better cluster with temp gauge....... __________________ "Fighting for our freedoms....."

03-31-2005, 01:20 AM	#7
ureckme ureckmefixit2@cox.net Join Date: Dec 2004 Location: Mesa AZ. (Phoenix) Posts: 1,284	It's a wire that runs to the main harness on the fire wall. On my truck theres more than one green wire. A/c, fast idle, and temp sender run down the left side of the engine next to the carb and valve cover. some of them run down the block under the Exhost manifold. It could have fallen down the back of the engine. The wire comes out of the harness above the dist. ( on my truck ). when you find the wire ground it out and your gauge should move to hot. Matt

03-31-2005, 07:58 AM	#8
pedrofixlater 75 STEPSIDE Join Date: Mar 2005 Location: Suffolk, VA Posts: 92	As you said there should be a dark green wire in the main harness that is hooked up to nothing. As mat said there may be more than one. Find it ground it and gauge will max out. Pete __________________ Pete 75 Chevy Stepside 70 Buick Skylark/GS

03-31-2005, 09:33 AM	#9
woody96 Registered User Join Date: Jan 2005 Location: Chapin, SC Posts: 392	Thanks THX guys! Appreciated......I hope its there, this 305 has been rebuilt with a cam and such, and non-environmental Edelbrock 1406 carb (no emissions stuff anywhere), so I hope that the wire is there somewhere.......I am finding some things not hooked up or just laying there from the engine transplant.....UGH!!!!! __________________ "Fighting for our freedoms....."

04-01-2005, 11:00 AM	#10
woody96 Registered User Join Date: Jan 2005 Location: Chapin, SC Posts: 392	THANKS for the great scoop guys....found the wire/lead hanging off of the side of the drivers side manifold....touched to ground and the gauge pegged....then hooked it up where it needs to be!!! [B]AWESOME help here.....GREAT board, I appreciate it! __________________ "Fighting for our freedoms....." Last edited by woody96; 04-01-2005 at 11:02 AM.

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