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2005 GT : temperature guage issue + speedometer needle low

 
flexmiller
New User
Posts: 13
Joined: 07/13
Posted: 01/12/14 02:36 PM

I will be taking in my'05 GT to the shop but thought I'd see if anyone has some input on my guage issues: sometimes the Temperature guage will go beyond the halfway mark and the speedo will be low as the needle drops below 0 while stopped at a set of traffic lights.There are no 'heating' issues and both will reset if I turn the car off, wait a minute or so, and then restart it. I appreciate any comments - thanks.
Kevin,
Confused  

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wayne712222
User
Posts: 65
Joined: 10/13
Posted: 01/12/14 03:34 PM

absolutely.. you will need some kind of hand held digital volt meter.. and probably half an hour..

a stainless steel wire tooth brush from the hardware or paint store.. and a few tools..

print this voltage drop test and follow it..

post results..

why.. because i have fixed so many cars with bad grounds.. you would not believe it..
this is an image like a photograph

Voltagedroptesting


after you have tested..

i have a few places for you to clean.. these are for a 2007 model.. but it should be the same as yours..

there should also be a G100 over near the G102 G103.. clean at least the G107 as thats on top of the frame rail..

2007Mustangunderhoodgrounds Zps1559ba45



2007Mustang G204 Zpsa79a09f6


2007Mustang G203 G205 Zps1ea00b18

2007Mustangdashg201 G202 Zpsfd2cd132


i looked at the cluster diagrams.. seems that most are grounded at G201..

so G201 and G107 are important places to clean.. along with the battery posts and terminals...  

Post Reply
wayne712222
User
Posts: 65
Joined: 10/13
Posted: 01/12/14 03:39 PM

by the way... the entire dashboard comes out with 2 bolts on one end.. 2 bolts on the other.. then 3 or 4 across the windshield..   please... do all the G200 grounds.. and make sure the dashboard is bolted in tight at the ends..  or run a voltage drop test from G201 to G204 or G205. where its bolted to the body..


you will need to have the digital volt meter on 2 volt or 2,000 millivolt scale to perform these tests... you should get close to 0.000.. but in all reality.. you should get 0.009 just below 0.01 volts..

if you get more than 0.020 you have a bad connection between the places you are testing..  figure it out and clean them..

Harborfreightvoltmeter37772

PLEASE DISCONNECT THE NEGATIVE TERMINAL and wait 5 minutes.. this is engine off .. BEFORE DISCONNECTING ANY GROUND connections for cleaning..

i don't want you accidently setting off the air bags...  

Post Reply
flexmiller
New User
Posts: 13
Joined: 07/13
Posted: 01/13/14 02:45 PM

WOW !! This is fantastic information - lots of detail and right to the point. Thank you very much and will let you know once I get at it. Regards,
Kevin Grin

will be taking my GT into the shop on Wed 22nd for these issues and have made a copy for the dealership here near Toronto - Summit Ford. Thanks Smile  

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flexmiller
New User
Posts: 13
Joined: 07/13
Posted: 01/13/14 02:45 PM

WOW !! This is fantastic information - lots of detail and right to the point. Thank you very much and will let you know once I get at it. Regards,
Kevin Grin  

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flexmiller
New User
Posts: 13
Joined: 07/13
Posted: 01/22/14 04:19 PM

I gave your info to the dealership today and they are indicating that I need to replace the entire guage cluster in my 2005 GT - they will need to order the part. I told them to check all locations you pointed out but I,m not sure they checked all of them. Thanks again for your help.  Kevin  

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wayne712222
User
Posts: 65
Joined: 10/13
Posted: 01/22/14 07:28 PM

as long as they can guarantee that replacing the cluster will FIX THE problem with out additional costs to you...


rule 1..

replace the expensive parts first..

rule 2..

oops.. that did not fix it..  charge hour upon hour of diagnostic time to find complicated issues like the need to replace the PCM.. the wiring harness.. the battery.. the alternator.. the muffler bearings..


Mufflerbearing Zps1f798606  

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wayne712222
User
Posts: 65
Joined: 10/13
Posted: 01/22/14 07:33 PM

OH.. there are ENTIRE sections of the service manuals devoted to the gauge diagnostics..  

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flexmiller
New User
Posts: 13
Joined: 07/13
Posted: 01/29/14 04:46 PM

Yes the new cluster works the first time - thank you. Good one on the 'muffler bearings'.
regards,

Kevin Grin  

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wayne712222
User
Posts: 65
Joined: 10/13
Posted: 01/29/14 04:56 PM

glad it works..  ground wires are such an issue on cars and trucks..  and checking the ground wire connections is a lot cheeper than changing parts... sometimes..


muffler bearings

chevy corvair water pumps..

light bulb liquid..

spray cans of prop wash..  

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flexmiller
New User
Posts: 13
Joined: 07/13
Posted: 02/02/14 11:21 AM

Agreed - it's a lot cheaper to check grounds although the dealership did mention that the tech checked a few-who knows if he did. Thanks again-Kevin  

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flexmiller
New User
Posts: 13
Joined: 07/13
Posted: 02/02/14 11:22 AM

Agreed - it's a lot cheaper to check grounds although the dealership did mention that the tech checked a few-who knows if he did. Thanks again-Kevin  

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