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Post by jon on Apr 21, 2016 20:28:53 GMT
I put 2 big holes in the firewall, one on each side. The harness is a big U shape.
I ran the wires that go to the rear in front of the firewall and down the trans tunnel.
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Post by zeitgeist on Apr 21, 2016 20:36:01 GMT
I put 2 big holes in the firewall, one on each side. The harness is a big U shape. I ran the wires that go to the rear in front of the firewall and down the trans tunnel. Cool thanks for the info Jon. I'll give that a try. Currently  Here is the harness to the rear  I'm also struggling to figure out this connector. I have it labeled "top rear of cam cover Coil pack?" Like I wasn't sure what it went to. 4 wires black with red stripe, black with white stripe, purple with white stripe and blue. Nothing anywhere near it has a similar connection. I wonder if it is needed but it comes off the main engine harness.   |
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Post by colin on Apr 21, 2016 22:00:25 GMT
I had one in a similar location that connected to wires that came up from the exhaust sensor.
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Post by zeitgeist on Apr 21, 2016 22:20:59 GMT
That is what it is. I figured it out when I ran the rear harness section and looked at the O2 sensor connections of the new ones I have. I forgot I removed the exhaust with O2 sensors. Thanks for the help.
I also ran the rear harness in the tunnel which helps for a little cleaner look.
What is everyone doing for grounds? I can run some rivnuts but prefer not to everywhere. Anyone using sheet metal screws for grounds?
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Post by einy on Apr 21, 2016 22:34:36 GMT
Combo of sheet metal screws for small diameter connectors, and 6mm thru bolts for larger ones. Scrape off paint / powder coat behind each connection from your frame so you get a very positive contact. Optionally cover with a dab of grease after connection is made to ward off corrosion.
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Post by zeitgeist on Apr 21, 2016 23:36:08 GMT
Thanks Einy. I am finding grounds at these locations. Any you think I missed?
Under drivers side headlight (Multi connector)
Under pass side headlight (Multi connector)
PPF near diff (single eyelet)
2 near instrument cluster that are single brass eyelets
Near instrument cluster (Multi connector)
Passenger side B pillar (Double wire single eyelet)
Single on connector harness from main harness to rear harness near rear O2 sensor connector
1 single eyelet on ABS pump mount
1 hidden under plastic cover on engine bay fuse/relay box
Main at battery negative terminal
Anyone think of any others I may have missed to double check?
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Post by buildercg on Apr 22, 2016 18:26:05 GMT
Thanks Einy. I am finding grounds at these locations. Any you think I missed? Under drivers side headlight (Multi connector) Under pass side headlight (Multi connector) PPF near diff (single eyelet) 2 near instrument cluster that are single brass eyelets Near instrument cluster (Multi connector) Passenger side B pillar (Double wire single eyelet) Single on connector harness from main harness to rear harness near rear O2 sensor connector 1 single eyelet on ABS pump mount 1 hidden under plastic cover on engine bay fuse/relay box Main at battery negative terminal Anyone think of any others I may have missed to double check? My '93 engine has a ground (not attached to harness) on the back/driver side connected to the firewall. |
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Post by zeitgeist on Apr 22, 2016 21:00:53 GMT
Thanks Einy. I am finding grounds at these locations. Any you think I missed? Under drivers side headlight (Multi connector) Under pass side headlight (Multi connector) PPF near diff (single eyelet) 2 near instrument cluster that are single brass eyelets Near instrument cluster (Multi connector) Passenger side B pillar (Double wire single eyelet) Single on connector harness from main harness to rear harness near rear O2 sensor connector 1 single eyelet on ABS pump mount 1 hidden under plastic cover on engine bay fuse/relay box Main at battery negative terminal Anyone think of any others I may have missed to double check? My '93 engine has a ground (not attached to harness) on the back/driver side connected to the firewall. Good catch. I found that one today while triple checking everything getting ready for starting soon. Waiting on the heater bypass hose to come in to the parts store and a couple small things but getting close. |
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Post by zeitgeist on Apr 22, 2016 21:08:00 GMT
Quick question. does not having the emergency 4 way flasher switch plugged in affect anything? I thought I read somewhere it was key to something but now don't remember. I lost mine somewhere in the build and teardown process.
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Post by buildercg on Apr 22, 2016 21:45:09 GMT
Quick question. does not having the emergency 4 way flasher switch plugged in affect anything? I thought I read somewhere it was key to something but now don't remember. I lost mine somewhere in the build and teardown process. Not sure if it affects anything electronically, but you may need it or a suitable replacement if you plan to pass inspection. My state, MA, requires 4 way hazard lighting. |
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Post by gwnwar on Apr 23, 2016 5:51:31 GMT
You need the 4 way switch for the turn signals to work..Power goes through it first.. one on ebay now cheap search 1999 miata hazard switch
eBay item number:
201349066865
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Post by jwagner on Apr 23, 2016 14:31:46 GMT
I think it depends on the year of the donor. My flasher switch is sitting in a ziplock and the turn signals do work. (1996)
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Post by zeitgeist on Apr 23, 2016 23:02:21 GMT
Well good news and bad news today. I filled and checked all the fluids. double checked all the wiring connections and ground points. Added some fuel approx 4 gallons to the maybe 1/8 tank of old gas then connected the battery. No sparks. I turned the key to the ON position and got a click. Over to the start position and she cranked. I cranked it for approx 20-30 seconds with no running. Stopped and and turned the key on and off in 20-30 second intervals to see if the new fuel line would fill but never heard the fuel pump. I tried a little ether and cranked again with no luck. I stopped trying to start it and began some trouble shooting.
With key turned to on position 1 relay clicks. I have no power to the dash and none to the fuel pump when checking with a multimeter. All fuses are good both small ones and larger ones under the hood.
I unplugged the ECU and checked the connectors. I had 1 point that had 12V with the key in the off position. No other wires had any voltage at the ECU with key in OFF position. I am getting 12V at the large fuse in the under hood box that is labeled IGN. I tried to check the coil connections with them plugged in but couldn't get a connection. Pulled a plug wire and while cranking got no spark but again working alone makes it tough to hold the wire and turn the key.
I had to stop to take care of weekend duties but I don't have a service manual and I am not sure where to start or the process other than checking connections, checking for 12V at the coils and fuel pump connection and so far I have no power at either nor the dash. The grounds are tight and I scraped the paint and primer off. I checked the ohms and get the same whether touching the bolt,eyelet or bare chassis points at each ground point. I don't find any connections not connected except those plugs that I have nothing to connect it to such as lights,wiper,HVAC,cigarette lighter,power Antenna,radio etc..
I would greatly appreciate any questions,links or guides to help solve the issue.
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Post by jon on Apr 23, 2016 23:21:38 GMT
You are 99 donor, right?
Immobilizer issue maybe?
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Post by zeitgeist on Apr 24, 2016 1:44:57 GMT
Yes 1999 donor. Would that cause no power to the instrument cluster? I am not finding anything online about the immobilizer. I'm not sure which box that is or how to check it.
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