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instrument gauge cluster problems

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detmarlin65 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote detmarlin65 Quote  Post ReplyReply Direct Link To This Post Topic: instrument gauge cluster problems
    Posted: Feb/09/2019 at 5:56pm
reinstalling the instrument cluster back in the dash, installed new dash bulbs and new fuel sending unit, gauges on temp and fuel read high and the main bulb (bigger bulb upper center) on circuit board flashes? how do  i go about testing for this problem. i have a 1965 marlin

thanks 
BjH
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george w View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote george w Quote  Post ReplyReply Direct Link To This Post Posted: Feb/10/2019 at 5:00pm
Not sure about 65 Marlins, but starting in 67 AMC used a "flasher" bulb for the parking brake on warning light. It wasn't a wedge base bulb but rather a regular miniature bayonet style with a small, round glass globe.
Maybe you have one of these in that position as I don't believe there's such a thing as a "main" instrument cluster bulb.
Long time AMC fan. Ambassador 343, AMX 390, Hornet 360, Spirit 304 and Javelin 390. All but javelin bought new.
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detmarlin65 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote detmarlin65 Quote  Post ReplyReply Direct Link To This Post Posted: Feb/10/2019 at 5:12pm
yes it is a bayonet style round glass globe in the upper middle of the board.but not were the brake warning lens is. 
BjH
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Post Options Post Options   Thanks (0) Thanks(0)   Quote BDCVG Quote  Post ReplyReply Direct Link To This Post Posted: Feb/10/2019 at 6:04pm
If You have a voltage regulator on that year dash, I'd  replace it.
1965 Austin-Healey 3000

1970 AMX 390 5 spd, Control Freak IFS and rear coil overs,4 wheel disc brakes

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farna View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote farna Quote  Post ReplyReply Direct Link To This Post Posted: Feb/12/2019 at 6:36am
The voltage regulator is bad. Any time both the fuel and temp gauge have the same faulty signs (both reading high or low, or not at all) that's most likely the case. Best replacement is a LM7805 electronic regulator. You can probably find an original type, but the electronic one is easy and reliable, and unseen.



Edited by farna - Feb/12/2019 at 6:38am
Frank Swygert
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detmarlin65 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote detmarlin65 Quote  Post ReplyReply Direct Link To This Post Posted: Feb/12/2019 at 7:52am
i thought the 65 marlins did not have a regulator , the only part that slightly looks like a regulator
has part 105c on it. is that it?
BjH
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farna View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote farna Quote  Post ReplyReply Direct Link To This Post Posted: Feb/13/2019 at 5:59am
Looking at the back of the instrument cluster, the IVR is to the right and above the speedometer bulge. Hard to miss, it's a little metal rectangular piece. With the cluster mounted in the dash it would be on the driver's side of the speedo, but I don't think you can remove it with the cluster in.

The Ambassador that year had the IVR built into the fuel gauge. That was surprising! I knew they put it in the fuel gauge on the Hornets and Gremlins, and late model Americans, but thought all the big cars (and up to mid 60s Americans) had a removable IVR.

Marlin is Classic based in 65 and 66, only the 67 was Ambassador based.


Edited by farna - Feb/13/2019 at 6:03am
Frank Swygert
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detmarlin65 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote detmarlin65 Quote  Post ReplyReply Direct Link To This Post Posted: Feb/13/2019 at 6:09am
ok i see it held in by 2 peg's , i will order the part and solder it in, do i need a heat sink for the new regulator or can i just mount on board, grounded of course,

thanks
BjH
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farna View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote farna Quote  Post ReplyReply Direct Link To This Post Posted: Feb/13/2019 at 6:37am
Mine is just mounted to the board, no heat sink. I think TomJ's was like that too (it's his website). The little tab appear to be enough. I don't even know if the thing gets warm, all I can say is mine has been in there with no issues since 2003 and at least 70K miles, many of those on long trips between Gulfport MS and Lexington SC (8-9 hours) and Dover DE to Lexington SC (9-10 hours). I made those trips a couple times a year for six years when I was in the USAF -- it was my daily driver then. Got a truck shortly after I retired in 2007 and use it for work, hardly drive the Rambler in the last 6-7 years! Got to remedy that...
Frank Swygert
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detmarlin65 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote detmarlin65 Quote  Post ReplyReply Direct Link To This Post Posted: Feb/13/2019 at 7:25am
thanks for help, i will do that.
BjH
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