Calling any wiring gurus
Hey guys so I have what I think is probably a hard question to answer without seeing the wiring but there may be common issues that I don't know about.
So my miata ('93 with '97 1.8) has trouble getting power. Sometimes it starts just fine and other times I turn the key and there's nothing. No lights, no cranking, nothing. Which means no power. I know absolutely nothing about wiring. I'd love to learn so I guess the first step would be to ask you guys what I should check. I've checked all grounds and they all seem to be fine. The negative battery terminal ground is pretty ugly. The kid who did the swap didn't do the greatest job. That wire is frayed all around the ground but it is grounded so I don't think that would be the issue. Any help would be appreciated. Thanks |
Originally Posted by ryankpeck
(Post 1313852)
So my miata ('93 with '97 1.8) has trouble getting power. Sometimes it starts just fine and other times I turn the key and there's nothing. No lights, no cranking, nothing. Which means no power.
How about the radio, the wipers, and the HVAC blower? My guess here is that the problem is in the vicinity of the keyswitch. Either the switch itself or the wiring behind it. If the headlights, brake lights and horn work, but nothing else does, then it's almost certainly that switch. |
replace your battery ground, and make sure the battery itself isnt bad.
|
Pics when you get a chance.
By checking the connection I assume you mean unscrewing that connection, cleaning all associated parts to bear metal; a Dremel with a wire wheel works great for this. Assemble with dielectric grease. Repeat for all grounding points. The ground from the battery can be upgraded with one of the many fine products we have available. my .02 -JB |
By no power I mean absolutely nothing. No brake lights, headlights or headunit. The grounds I've taken them all apart and made sure they were down to bare metal with a wire wheel. I haven't used dielectric grease but I can definitely do that.
When I get a chance today I'm going to take a picture of the negative ground because after looking up replacement negative battery wires I'm thinking it may be wrong. I replaced the ignition switch a while back because it was bad but this is different as I have absolutely nothing happening. It's also a brand new battery so that's not the problem. |
Hmm...
It could also be the 80A Main fuse, or the connections thereto. It's in the box under the hood, and is secured with screws underneath. |
Just did this with my car. It was a badly corroded negative terminal on the battery. It sounds like itnmay be something different for yours if you have cleaned that up though.
|
Changed the 80A main fuse yesterday thinking that was it because it was pretty badly corroded but that didn't make a difference unfortunately.
|
Originally Posted by x_25
(Post 1313886)
Just did this with my car. It was a badly corroded negative terminal on the battery. It sounds like itnmay be something different for yours if you have cleaned that up though.
|
the miata already has shitty grounding.
if you have a frayed ground strap your miata isn't going to play nicely. |
Alright well I guess the negative ground is definitely the first step then! Thanks braineack
|
1 Attachment(s)
https://www.miataturbo.net/attachmen...ine=1457453368
Remember that all of the +12V comes down the starter cable to the starter and then gets distributed from there. I'd check that connection first before replacing anything. |
Oh wow ok that's definitely something I haven't checked. Thanks a lot barby
|
Also, looking at that diagram, it shows the negative battery cable just grounds and that's all. Mine goes further than just grounding. I'll have to check to see where it stops next but I know for sure it doesn't just ground and end there.
|
Originally Posted by ryankpeck
(Post 1314213)
Also, looking at that diagram, it shows the negative battery cable just grounds and that's all. Mine goes further than just grounding.
The other key ground is the obvious one from the engine block to chassis on the exhaust side, but I'm sure you've already verified that. |
Originally Posted by ryankpeck
(Post 1314213)
Also, looking at that diagram, it shows the negative battery cable just grounds and that's all. Mine goes further than just grounding. I'll have to check to see where it stops next but I know for sure it doesn't just ground and end there.
|
I have checked the engine-chassis ground but I haven't looked at the ppf so I'll check the starter connection and the ppf ground tonight.
|
Alright so I just want to give an update.
Today I changed the starter, battery terminals and fixed up all grounds including dielectric grease. I'm pretty sure that the starter was the issue but I can't be completely sure since I did so many other things. Thanks to all you guys for suggesting things to do! |
Originally Posted by Braineack
(Post 1313859)
replace your battery ground, and make sure the battery itself isnt bad.
|
The brain didn't even mention the terminal end in his post and if you read the last post the problem has been resolved. Pretty sure it was just a bad starter connection
|
All times are GMT -4. The time now is 09:38 PM. |
© 2024 MH Sub I, LLC dba Internet Brands