71 Roadrunner not starting

Technical Question and Answer - On topic to 71-74 Plymouth B-bodies only.

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72beepbeep
Satellite Coupe (RL)
Posts: 14
Joined: Fri Feb 03, 2012 7:00 pm
My Cars: 1972 Plymouth Roadrunner 4spd, 400 block all matching numbers. Project Car!!

71 Roadrunner not starting

Post by 72beepbeep » Fri May 18, 2012 11:55 pm

Hey guys,

I recently imported a 71 roadrunner. We put a brand new battery into it and when we turned the key no dash lights come on and the car won't turn over. When I turn the key the aftermarket tacho flicks up and down slightly and the horn works but the indicators etc don't. The posts are clean and the + cable to the starter motor is on pretty tightly. Also there is no traditional "clunk" of the solenoid trying to engage the starter. What else could be the problem?

Cheers
Ash

dangina
GTX (RS)
Posts: 394
Joined: Sat Feb 12, 2011 12:28 am
My Cars: 71 roadrunner
Location: lethbridge, ab

Re: 71 Roadrunner not starting

Post by dangina » Sat May 19, 2012 11:00 am

bad ground. was the biggest of my troubles, casued all kinds of grief.
400 stroked to 470ci, 3:55 Eaton true trac, slightly upgraded suspension lol

BUILD THREAD!!!! http://www.protouringmopar.com/showthread.php?796-1971-Speedipus-Rex&highlight=speedipus

fiddlerfingers
Road Runner (RM)
Posts: 39
Joined: Thu Oct 15, 2009 11:40 am
My Cars: 71 Roadrunner
67 Charger

Re: 71 Roadrunner not starting

Post by fiddlerfingers » Sat May 19, 2012 12:25 pm

Try taking a screw driver and jumping the solenoid. Turn your key to the on position, then Remove the little wire that is snapped on the solenoid and jump from that post the the starter wire post and see if it turns over. My car used to do that till I changed the solenoid. It was 20 yrs ago so I carried a screw driver for about 3 months till i could afford to fix it... :bump:

72beepbeep
Satellite Coupe (RL)
Posts: 14
Joined: Fri Feb 03, 2012 7:00 pm
My Cars: 1972 Plymouth Roadrunner 4spd, 400 block all matching numbers. Project Car!!

Re: 71 Roadrunner not starting

Post by 72beepbeep » Sat May 19, 2012 6:54 pm

Oh cool, I will try that! The earth cables coming off the negative terminals were on satisfactorily on the frame and engine quite well. The thing is the car was running fine before it got on the ship in LA and when it came here (was on the ship for a good 2 months) it didn't want to start!

E86 GTX
Satellite Sebring Plus (RP)
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Joined: Tue Mar 27, 2012 10:57 pm
My Cars: 1971 440 GTX Tor Red getting TLC in my home shop...
1972 Satellite parts car
Could Kick myself for selling my 71 Butterscotch W/Black Gator top
383 Roadrunner back in the late 70's
Location: LA...... Thats Lower Alabama
Contact:

Re: 71 Roadrunner not starting

Post by E86 GTX » Sat May 19, 2012 10:58 pm

Isn't there a Fusable Link on 1971 Road runners?
If River Boats were a dime a dozen............
All I could do is run up and down the bank hollering "Ain't that cheap."

72beepbeep
Satellite Coupe (RL)
Posts: 14
Joined: Fri Feb 03, 2012 7:00 pm
My Cars: 1972 Plymouth Roadrunner 4spd, 400 block all matching numbers. Project Car!!

Re: 71 Roadrunner not starting

Post by 72beepbeep » Sun May 20, 2012 12:06 am

Im not too sure, someone told me to check that but I wasn't too sure if they had one or where to find it!

Ronnman
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Joined: Wed Apr 25, 2007 9:43 pm
Location: Slidell, LA

Re: 71 Roadrunner not starting

Post by Ronnman » Sun May 20, 2012 9:10 pm

A 71 RR does have a fusible link. It is found connected to the large stud on the starter relay and the other end is connected to a fairly large red wire via black connector. Check the fusible link wire where it enters the two connectors. See pic below.
Ron
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Fusible Link 1.jpg
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dangina
GTX (RS)
Posts: 394
Joined: Sat Feb 12, 2011 12:28 am
My Cars: 71 roadrunner
Location: lethbridge, ab

Re: 71 Roadrunner not starting

Post by dangina » Mon May 21, 2012 2:35 am

Ronnman wrote:A 71 RR does have a fusible link. It is found connected to the large stud on the starter relay and the other end is connected to a fairly large red wire via black connector. Check the fusible link wire where it enters the two connectors. See pic below.
Ron
this was another one o my issues before as well! you can try this one - cheap fix
400 stroked to 470ci, 3:55 Eaton true trac, slightly upgraded suspension lol

BUILD THREAD!!!! http://www.protouringmopar.com/showthread.php?796-1971-Speedipus-Rex&highlight=speedipus

72beepbeep
Satellite Coupe (RL)
Posts: 14
Joined: Fri Feb 03, 2012 7:00 pm
My Cars: 1972 Plymouth Roadrunner 4spd, 400 block all matching numbers. Project Car!!

Re: 71 Roadrunner not starting

Post by 72beepbeep » Tue May 22, 2012 2:15 am

Cheers Ron

She's gone away to get panel and paint done so I don't have a chance to look at it. However I will point this out to the panelbeater!

gcoupe72
GTX (RS)
Posts: 147
Joined: Fri Mar 11, 2011 11:14 am
My Cars: 1972 Road Runner originally equipped as lemon twist,400,4spd,air grabber,performance axle pkg.,bk. interior.
Location: North Carolina

Re: 71 Roadrunner not starting

Post by gcoupe72 » Tue May 22, 2012 8:46 am

When you see the car again, especially after any painting.
Check and make sure you still have a ground wire from the negative(earth) battery terminal to the radiator support. If not, then add one. If still there, remove the terminal at the radiator, clean and reinstall.
I had this problem when trying to get my newly purchased '72 started. After I added this wire, EVERYTHING worked properly. The last inspection sticker on the glass was 1983!
Good luck!

JimT1971RR
GTX (RS)
Posts: 104
Joined: Sat Sep 22, 2012 10:56 pm
My Cars: 1971 Roadrunner.
Location: Long Beach, CA

Re: 71 Roadrunner not starting

Post by JimT1971RR » Sat Sep 22, 2012 11:35 pm

You didn't say if it is automatic or manual. If it is a manual, the clutch needs to be depressed in order for it to turn over. Also, if the switch is bad on the clutch, it can be bypassed by cutting the wire from the starter solenoid to the clutch and grounding it to the frame. You just need to make sure that the car is not in gear while turning the key. I did this with my 71 rr and it works just fine.

P.S. my car is a non numbers matching driver and I don't mind the slight modification. Otherwise you may need to check and/or replace the clutch switch.

dangina
GTX (RS)
Posts: 394
Joined: Sat Feb 12, 2011 12:28 am
My Cars: 71 roadrunner
Location: lethbridge, ab

Re: 71 Roadrunner not starting

Post by dangina » Tue Sep 25, 2012 9:22 pm

grounds. seems to be all 99% of my wiring problems.
400 stroked to 470ci, 3:55 Eaton true trac, slightly upgraded suspension lol

BUILD THREAD!!!! http://www.protouringmopar.com/showthread.php?796-1971-Speedipus-Rex&highlight=speedipus

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