Blazer Tank Conversion - Sending Unit Wire - The 1947 - Present Chevrolet & GMC Truck Message Board Network

tsetsaf · 04-14-2008, 10:19 AM

What have you used to wire the new tank behind the rear end. I spliced my original wire but there is too much resistance so it reads "E".

Thx

JimKshortstep4x4 · 04-14-2008, 10:38 AM

With the gauge setup more resistance should make the dash unit read beyond full since "0" ohms = empty and 90 ohms = full.

If you are reading empty then I would suspect that the wire from the tank is grounded to the truck somewhere. Try disconnecting the sender wire at the fuse panel to see if the dash guage reads full with the wire disconnected.

Jim

Jim

tsetsaf · 04-15-2008, 04:04 AM

That is an easy answer... the gauge does not read full when the wire is disconnected; rather it reads 1/4 tank. Once I hooked up the wire it went to "E".

Gauge Problem?

tsetsaf · 04-18-2008, 03:48 AM

ttt

jayharrell · 04-18-2008, 04:03 AM

Guage is 30 ohms, Sending unit is 90 ohms. Put a 45 or 47 ohm resister *depending on what the parts storr has in stock* inline right before the guage.

Run a search for fuel guage ohm and you should get what you need.

04-14-2008, 10:19 AM	#1
tsetsaf Registered User Join Date: Dec 2007 Location: Southern CA Posts: 210	Blazer Tank Conversion - Sending Unit Wire What have you used to wire the new tank behind the rear end. I spliced my original wire but there is too much resistance so it reads "E". Thx __________________ 71 C-20 Custom Camper California Truck

04-14-2008, 10:38 AM	#2
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Re: Blazer Tank Conversion - Sending Unit Wire With the gauge setup more resistance should make the dash unit read beyond full since "0" ohms = empty and 90 ohms = full. If you are reading empty then I would suspect that the wire from the tank is grounded to the truck somewhere. Try disconnecting the sender wire at the fuse panel to see if the dash guage reads full with the wire disconnected. Jim Jim __________________ 1971 Shortbox step side 4x4, 350 sbc, 3:07 rear end 1965 Impala SS 400 sbc, Muncie rock crusher 1966 Impala SS 396 bbc, TH 400 1969 El Camino, 350 sbc, TH 350 1971 Snowplow built on a Blazer frame 1972 GMC Short bed, stepside, TH 400, 427 BBC

04-15-2008, 04:04 AM	#3
tsetsaf Registered User Join Date: Dec 2007 Location: Southern CA Posts: 210	Re: Blazer Tank Conversion - Sending Unit Wire That is an easy answer... the gauge does not read full when the wire is disconnected; rather it reads 1/4 tank. Once I hooked up the wire it went to "E". Gauge Problem? __________________ 71 C-20 Custom Camper California Truck

04-18-2008, 03:48 AM	#4
tsetsaf Registered User Join Date: Dec 2007 Location: Southern CA Posts: 210	Re: Blazer Tank Conversion - Sending Unit Wire ttt __________________ 71 C-20 Custom Camper California Truck

04-18-2008, 04:03 AM	#5
jayharrell Gettin By on Gettin By Join Date: Jan 2008 Location: Cedar Creek, Tx Posts: 1,033	Re: Blazer Tank Conversion - Sending Unit Wire Guage is 30 ohms, Sending unit is 90 ohms. Put a 45 or 47 ohm resister depending on what the parts storr has in stock inline right before the guage. Run a search for fuel guage ohm and you should get what you need. __________________ 69 CST10 LWB 455 Buick 00 S10 2.2 Vin5 76 GL1000 Naked 1bl VW carb "Adios to all the concrete; Gonna get me some dirt road back streets" Last edited by jayharrell; 04-18-2008 at 04:04 AM.



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