Help Hardwiring dash cam

[Hokuto]

Title speaks for itself, but I got one of these: 
https://www.amazon.com/gp/product/B071YT5YLP/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1
 

Im using the cig lighter fuse which is 15 amps and it works when i put the fuse and the fuse tap in. I tried using the hardwire kit here:
https://www.amazon.com/gp/product/B077C1HTPK/ref=oh_aui_detailpage_o05_s00?ie=UTF8&psc=1
 

and then crimp it it doesn't power the dashcam, 
PS: i plan on getting this to see the license plate better:
https://www.amazon.com/gp/product/B076F27TLH/ref=ox_sc_sfl_title_12?ie=UTF8&psc=1&smid=A3CIGEUYW4U1DT
 

but currently using this
https://www.amazon.com/VANTRUE-OnDash-R2-Vantrue/dp/B01CODX8ZY/ref=sr_1_16?ie=UTF8&qid=1517084364&sr=8-16&keywords=vantrue+dashcam

Edit: Does having something in the cig lighter affect it?

[Oshino Shinobu]

So are you trying to attach the hardwire kit to the fuse tap in? I'd advise soldering it in rather than crimping, it often works better. You could try changing the location of the ground too to see if that helps. 

[Hokuto]

I would solder but I don't have a soldering iron and I can't really access any "good" grounding places

My car is a 2007 Lexus GS 350 and im using the fusebox on the passenger side, I tried removing the 4 screws attached to the glove box but i can't find the 4th one

[Oshino Shinobu]

32 minutes ago, karneychen said:

I would solder but I don't have a soldering iron and I can't really access any "good" grounding places

My car is a 2007 Lexus GS 350 and im using the fusebox on the passenger side, I tried removing the 4 screws attached to the glove box but i can't find the 4th one

So making contact with the wires works, but when you crimp it, it doesn't work? 

 

The only thing I could really recommend at that point is either to buy a cheap soldering iron and some solder and solder it in, or buy a pack of wire crimps and hope they work better. 

 

Is the ground actually grounded, even for testing? Basically any metal part of the car will do. It's worth testing, even if you're just touching it to something metal and haven't screwed it in yet. It's worth noting that you can also solder the ground if you have a bit of bare metal available (or you can sand it down to expose the metal) if you end up soldering the connection in. 

[Hokuto]

so even if the the backing is palstice, as long the the screw is screwing into a metal backplate of some sort it will still be considered grounded?

[Oshino Shinobu]

5 minutes ago, karneychen said:

so even if the the backing is palstice, as long the the screw is screwing into a metal backplate of some sort it will still be considered grounded?

Yes, as the ground connector is going to be making contact with the bolt/screw, which is then making contact with the metal it's screwing into, giving you a ground. 

[Hokuto]

ok thanks a lot

[Hokuto]

Ah i think i figured out the problem, the fuse tap was using aluminum