i have no power to my ignition,coil or out of the starter the old owner put the battery in backwards and shorted the whole system as i am rewiring it can anyone shed some light on the situation please.
no power to the ignition,coil plz help
- Thread starter shayno1988
- Start date
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Coolerman
SILVER Star
- Joined
- Jan 5, 2004
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- Paint Lick, KY
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Welcome to Mud mate!
Could you provide a bit more information?
How far along are you in the re-wire? Repairing the old harness or building a new one? Year/model of truck?
Could you provide a bit more information?
How far along are you in the re-wire? Repairing the old harness or building a new one? Year/model of truck?
Connector coming off the positive battery cable at the battery. There is a replaceable section on it. That is your fuseable link. Most likely it is blown.
When you install a battery with reversed polarity, usually only the wire between the alternator and the battery shorts out. Since this wire runs in a harness with other wires, sometimes these other wires can melt too. Cruisers made after the mid 70s have a fusible link at the battery that burns out first to prevent damage to your wiring harness, like Marshall said.
- Thread starter
- #5
cheers mate
it's a 1978 fj40 petrol doing a ground up reco and making it a ute.get it to startng then building a new harness. it melted
the wire from the alternater to the battery.
but there's power into the starter but no power out? atm i'm just wiring the ignition system to try get it started and there are no fusible links because the guy that used to own it did a home job on the wiring for example the main neg for the battery is red
i'm working on it today also see wat i can find. could someone tell me were the power for ignition comes from were should it be hookked up.
it's a 1978 fj40 petrol doing a ground up reco and making it a ute.get it to startng then building a new harness. it melted
the wire from the alternater to the battery.
but there's power into the starter but no power out? atm i'm just wiring the ignition system to try get it started and there are no fusible links because the guy that used to own it did a home job on the wiring for example the main neg for the battery is red
i'm working on it today also see wat i can find. could someone tell me were the power for ignition comes from were should it be hookked up.
Last edited:
but there's power into the starter but no power out? atm i'm just wiring the ignition system to try get it started and there are no fusible links because the guy that used to own it did a home job on the wiring.
The large battery cable to the starter only provides power to the starter during enging cranking (on a '78). All of the other power for the truck comes from the (burned out) white wire that goes from the battery near the + post through a fusible link that connects at the battery post to the amp meter in the dash. You should be able to repair it by replacing the large white wire from the battery to the amp meter and the white/blue stripe wire from the other side of the amp meter to the alternator. You might also have to replace any other wire in the harness that melted bad enough to expose the conductor. Put a fusible link in the battery wire so this doesn't happen again.
- Thread starter
- #7
at the moment it's only a rolling chassis everything is stripped exept the motor and drive train any ideas how i could hot wire it to start i have power to coil now but no spark. but i'll throw the amp meter back in and get back to u thanks.
- Thread starter
- #8
would u happen to have a decent wiring diagram as i have to rewire everything
look at coolermans signature
To hot wire it, you connect a wire from the + post of the battery to the + post of the coil. It doesn't get more basic than that.
You can find a '78 schematic diagram in the "tech links" part of this site above.
- Thread starter
- #11
thanks guys i've got it turning over with the key now cheers
power
good, now you've got power to turn it over in Start pos
do you also have 12v to the coil in start and run positions of the ignition switch?
good, now you've got power to turn it over in Start pos
do you also have 12v to the coil in start and run positions of the ignition switch?
- Thread starter
- #13
yep do now cheers
Good
Glad to hear it---- I wasnt sure if you had all the ignition back or just the starter turning
Glad to hear it---- I wasnt sure if you had all the ignition back or just the starter turning
- Thread starter
- #15
nah i got all power back except at the dizzy but wen i was doin it my battery died so gotta charge it then i'll get back to ya
- Thread starter
- #16
still have no power to the dizzy is the wire going in suposed to be pos or neg and were wat does it hook upto
ignition
I have an 81 schem does that look right?
Do you have the stock ignition?
should be a black wire from the neg side of the coil
I have an 81 schem does that look right?
Do you have the stock ignition?
should be a black wire from the neg side of the coil
- Thread starter
- #19
that's heeps better cheers mate that's the 1 they must have changed it aye. thanks for that
- Thread starter
- #20
still not working were does the dizzy get power from wat wire i still have'nt got spark.
