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post #1 of 21 Old 05-12-2019, 03:39 PM Thread Starter
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Shelby charger no start

I have an 85 shelby charger that will not start, door buzzer don't come on, fuel pump don't cycle on, gauges don't work. Now if I try jumping across the starter it will try to crank over. I have a brand new battery. Now, I have read about that it could be a bad auto shutdown relay. And I have read that this is part of the power module. I'm not an expert at electrical stuff. My question is if that is my issue, then how do I go about fixing it if it is integrated in the power module?
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post #2 of 21 Old 05-12-2019, 05:18 PM
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Re: Shelby charger no start

when you turn the ignition on what happens ?

do you get signs of life in the cluster?

we need a "power loss " light to light up for a second when you do (it does a 1 second bulb test every start)

if that works we can get codes , if any from it

if not then considering the lacking door buzzer I'd think you're not getting power due to something between the battery and the key , not the key and the power module

missing buzzer could be a separate issue - if it were my car it WOULD be "missing"
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post #3 of 21 Old 05-13-2019, 07:54 AM
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Re: Shelby charger no start

The ASD Relay has nothing to do with power to the instrument cluster or starter.

As already stated it sounds like you have an issue with the Battery, Battery Terminals, Battery Cables, etc.

Do you own a 12 volt test light or digital multi-meter?

Post Back and I will assist you with step by step instructions on testing/diagnosing the issue.

TEST LAMP
https://www.harborfreight.com/612v-c...ead-61652.html

MULTI-METER
https://www.harborfreight.com/7-func...ter-63604.html
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post #4 of 21 Old 05-13-2019, 07:06 PM Thread Starter
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No, I have no signs of life at the cluster, nor can I hear the fuel pump cycle on. I do have a meter and can check stuff if you would like to point me in the right direction. I am not very good at tracing wires, but if you tell me exactly what to check, it shouldn't be too tough. And I don't know if I said b4 or not, but my battery is brand new and fully charged.
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post #5 of 21 Old 05-14-2019, 07:50 AM
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Re: Shelby charger no start

This sounds like it may be a burnt fusible link issue but we have to start from the beginning before making that determination.

DIAGNOSTIC FLOW CHART
1)Be sure both battery terminals are clean/tight on the battery.
2)Be sure both battery cables are secured on the starter (+) and cylinder head/block (-).
3)If there are any pigtails coming off of the - or + battery cables be sure they are connected and secure.
(My wiring shows a pigtail coming from both the - and + battery terminals.)
4)With your meter on a 12 volt or 20 volt scale check voltage...
(Voltage should be approx. 12.60 volts with a fully charged battery)
a)Across the battery posts, touching just the two battery posts.
b)Across the cables at the battery touching just the terminal ends.
c)From the - battery terminal to the + cable at the starter.
d)From the + battery cable to the cylinder head/block and where the - battery cable is bolted.

Did all four checks have above 12 volts?

Post back with your results or if there are any problems/questions and we will proceed from there.
We can do this through PM if you are more comfortable doing that.

Since I do not know your skill level of using a multi-meter, just in case you need it...
https://learn.sparkfun.com/tutorials...multimeter/all

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post #6 of 21 Old 05-19-2019, 05:16 PM Thread Starter
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Ok. Sorry for taking so long to get back results here. Just had a chance to check voltages. Things have been crazy. Anyways, everything that you mentioned above appears to check out a ok.
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post #7 of 21 Old 05-19-2019, 09:48 PM Thread Starter
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Hey, I apologize for taking longer to get back to you. Things have been crazy. Anyways, I checked everything above and things check out ok with 12.45 volts at all places.
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post #8 of 21 Old 05-21-2019, 10:03 AM
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Re: Shelby charger no start

Before we start looking at the Ignition Switch we need to know if both power feeds, ground and output are present at the Starter Relay.

1)Red (RD) Constant Battery Voltage
2)Yellow (YL) Switched Ignition Voltage
a)Voltage will only be present with the key in the "Start position.
3)Brown/Yellow (BN/YL) Ground
a)Bolted to transaxle on manual trans, through Neutral Safety Switch on auto trans.
b)Less than 5 ohms continuity from relay connector to ground
4)If all of the above are present and correct...
a)Brown (BN) Output to Starter
b)Voltage will only be present with the key in the Start position.

Post Back with your results.

Shelby charger no start-relay-85-88-location.jpg

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post #9 of 21 Old 05-21-2019, 01:32 PM Thread Starter
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I will definitely check that stuff. Again, please give me a few days. I definitely appreciate your help.
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post #10 of 21 Old 05-28-2019, 04:59 PM Thread Starter
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Well I just checked stuff and I saw no voltage present at the starter relay. I was sort of confused by what you meant by how to check the ohms. And I didn't even attempt to check the last thing because you had said if all of the above was present and correct that I could move forward. I figured no use since no voltage was present. Again I apologize for taking so long. Was trying to prep for yard sale and holiday weekend. Things should b quicker and easier now. I appreciate the help and patience.
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post #11 of 21 Old 05-30-2019, 10:15 AM
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Re: Shelby charger no start

No voltage was present on which power feeds?
Red, Yellow or Both?

Remember you will only have power on the YL wire with the key in the "Start" position, not the "On" position.
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post #12 of 21 Old 05-30-2019, 11:41 AM Thread Starter
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Well from what I gathered there was no voltage at either place. I tried turning the key and watching the meter and saw nothing. I can try again tonight if you would like. I sorta thought maybe the meter was bad so I checked battery voltage and that read normal so I went back to the connector as you said and again got nothing
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post #13 of 21 Old 05-30-2019, 02:12 PM Thread Starter
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My email is [email protected] and cell number is 724 699 8172 if it'd b easier communicating. If not this way is still good.
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post #14 of 21 Old 05-31-2019, 11:37 AM
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Re: Shelby charger no start

If you have no power to either the RD or YL wire at the starter relay you may have blown a fusible link.

You will have to locate and check the Fusible links to be sure either with a Voltmeter before and after the link or by feel, a blown link will feel "mushy" as opposed to feeling solid.

The Fusible Links are Bundled and located in the harness coming from a Pigtail off of the + Battery Cable.

If you find a blown Fusible Link you can repair it with another fusible link of the same amperage rating or with an inline fuse/fuse holder.

Keep in mind that the Red Battery Feed to the Starter Relay does not run through a Fusible Link, it branches off before the link so it is also possible the wire from the + Battery Cable to the Links is broken (open) somewhere in the circuit.
Checking power into the Fusible links will tell if that is the case.

CHECKING/REPAIRING FUSIBLE LINKS
Electrical Issues - MiniMopar Resources

I will send you some wiring through PM so you can visually see what I am referring to.

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post #15 of 21 Old 05-31-2019, 09:25 PM Thread Starter
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So, before I start getting in too deep, I am assuming this is a fusible link? And if so, do they all appear similar to this?
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