The Ford Barn

flash9376 · 04-30-2012, 08:57 PM

I ordered a new ammeter to replace my original one, mainly for astetic purposes. The new one reads opposite of what its supposed to (+ instead of - and vise versa). I swapped it back out for the old one and it was working normally. Any idea how to fix this? My old ammeter is cracked so Id rather not use it. Thanks.

Steam Engine Pete · 04-30-2012, 09:04 PM

If you want to use the new one just swap the wires around and everything will be ok.

Pete

Gary WA · 04-30-2012, 09:11 PM

Or change out the glass.

Bruce Adams · 04-30-2012, 09:25 PM

Swap the wires since apparently they were designed to also cater to the Model T which has Negative Ground is what I was told.
No big thing to switch the wires.

RUNNERBUN · 04-30-2012, 10:13 PM

Have come up against this problem also in the past. Use the new one and change all the wiring from one terminal to the other. The new Amp meter will work as normal.

Ca. Kid · 04-30-2012, 10:57 PM

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I just installed a new 30amp yesterday. I had the same problem with polarity. Just switch the wires. The big problem was it didn't fit the hole. It is too small. I had to glue it in with RTV silicone.

Gary WA · 04-30-2012, 11:22 PM

Quote:

Originally Posted by Ca. Kid

I just installed a new 30amp yesterday. I had the same problem with polarity. Just switch the wires. The big problem was it didn't fit the hole. It is too small. I had to glue it in with RTV silicone.

Why 30 amp and not 20 amp?

Mike V. Florida · 05-01-2012, 04:32 AM

Quote:

Originally Posted by Gary WA

Why 30 amp and not 20 amp?

Let me guess, Alt and halogen bulbs.

V4F · 05-01-2012, 08:17 AM

i have a good amp guage if someone needs it . free is the operative word ......

[email protected]

flash9376 · 05-01-2012, 07:50 PM

Thanks for the replies, I wasnt sure if switching the wires would cause other problems but i guess its okay.

BILL WILLIAMSON · 05-01-2012, 09:37 PM

Remember, running 30 AMPS through a 20 AMP meter won't harm or FRY it. Bill W.

04-30-2012, 08:57 PM	#1
flash9376 Member Join Date: Jun 2010 Posts: 35	quick ammeter question I ordered a new ammeter to replace my original one, mainly for astetic purposes. The new one reads opposite of what its supposed to (+ instead of - and vise versa). I swapped it back out for the old one and it was working normally. Any idea how to fix this? My old ammeter is cracked so Id rather not use it. Thanks.

04-30-2012, 09:04 PM	#2
Steam Engine Pete Senior Member Join Date: Dec 2011 Location: Wahpeton, ND Posts: 138	Re: quick ammeter question If you want to use the new one just swap the wires around and everything will be ok. Pete

04-30-2012, 09:11 PM	#3
Gary WA Senior Member Join Date: May 2010 Location: Clinton,WA/Whidbey Island Posts: 4,106	Re: quick ammeter question Or change out the glass. __________________ www.whidbeymodelaclub.com

04-30-2012, 09:25 PM	#4
Bruce Adams Senior Member Join Date: May 2010 Location: Northport, NY Posts: 1,597	Re: quick ammeter question Swap the wires since apparently they were designed to also cater to the Model T which has Negative Ground is what I was told. No big thing to switch the wires.

04-30-2012, 10:13 PM	#5
RUNNERBUN Senior Member Join Date: Nov 2011 Location: Queensland Australia Posts: 640	Re: quick ammeter question Have come up against this problem also in the past. Use the new one and change all the wiring from one terminal to the other. The new Amp meter will work as normal. __________________ Adjust your points with gentle blows of a 2 pound hammer

04-30-2012, 10:57 PM	#6
Ca. Kid Member Join Date: Jul 2011 Location: San Andreas CA. Posts: 78	Re: quick ammeter question Sponsored Links (Register now to hide all advertisements) I just installed a new 30amp yesterday. I had the same problem with polarity. Just switch the wires. The big problem was it didn't fit the hole. It is too small. I had to glue it in with RTV silicone.

05-01-2012, 08:17 AM	#9
V4F Senior Member Join Date: May 2010 Location: ca. Posts: 2,522	Re: quick ammeter question i have a good amp guage if someone needs it . free is the operative word ...... [email protected] __________________ V4f

05-01-2012, 07:50 PM	#10
flash9376 Member Join Date: Jun 2010 Posts: 35	Re: quick ammeter question Thanks for the replies, I wasnt sure if switching the wires would cause other problems but i guess its okay.

05-01-2012, 09:37 PM	#11
BILL WILLIAMSON Senior Member Join Date: Dec 2010 Location: FRESNO, CA Posts: 12,560	Re: quick ammeter question Remember, running 30 AMPS through a 20 AMP meter won't harm or FRY it. Bill W. __________________ "THE ASSISTANT GURU OF STUFF"